Exhibit 2.2

                                                               EXECUTION COPY

                   OPTION TERMINATION AND GRANT AGREEMENT

     OPTION TERMINATION AND GRANT AGREEMENT, dated as of December 11, 1998 
(this "AGREEMENT"), by and among Allied Digital Technologies Corp., a 
Delaware corporation ("Allied"), Vaughn Communications, Inc., a Minnesota 
corporation ("VCI") and E. David Willette (the "OPTIONHOLDER").  Capitalized 
terms used but not defined herein shall have the meanings set forth in the 
Agreement and Plan of Merger, dated the date hereof, by and among Twin 
Acquisition Corp. ("TAC"), Allied Digital, Inc. and VCI (as such agreement 
may be amended from time to time, the "MERGER AGREEMENT").

     WHEREAS, concurrently herewith, TAC and VCI are entering into the Merger 
Agreement, pursuant to which TAC will be merged with and into VCI (the 
"MERGER"), whereby (i) each share of common stock, par value $.10 per share, 
of VCI ("VCI COMMON STOCK") issued and outstanding immediately prior to the 
Effective Time, other than certain shares as set forth in Section 2.1 of the 
Merger Agreement, will be converted into the right to receive cash and (ii) 
other than as set forth in this Agreement, each option to purchase VCI Common 
Stock (a "VCI STOCK OPTION") outstanding immediately prior to the Effective 
Time, whether or not vested or exercisable, will be cancelled and converted 
into the right to receive cash;

     WHEREAS, the Optionholder Beneficially Owns VCI Stock Options; and

     WHEREAS, the Optionholder desires to cancel, immediately prior to the 
Effective Time, all of his VCI Stock Options and, in consideration for such 
cancellation, acquire a non-qualified option to purchase shares of Series C 
Preferred Stock of Allied, par value $.01 per share ("SERIES C PREFERRED"), 
upon the terms and conditions set forth in the Stock Option Agreement and 
Letter of Grant attached hereto as Exhibit A ("OPTION GRANT AGREEMENT");

     NOW, THEREFORE, in order to implement the foregoing and in consideration 
of the mutual agreements contained herein, the parties hereby agree as 
follows:

     Section 1.  CERTAIN DEFINITIONS.  The following terms, when used in this 
Agreement shall have the following meanings (such definitions to be equally 
applicable to both singular and plural terms of the terms defined):

     "AFFILIATE" means, with respect to any Person, any other Person directly 
or indirectly Controlling, Controlled by, or under common Control with such 
Person, provided that no security holder of any Person shall be deemed an 
Affiliate of any other security holder solely by reason of any investment in 
such Person. For the purpose of this definition, the term "control" 
(including with correlative meanings, the terms "controlling", "controlled 
by" and "under common control with"), as used with respect to any Person, 
shall mean the possession, directly or indirectly, of the power to direct or 
cause the direction of the management and policies of such Person, whether 
through the ownership of stock, as a trustee or executor, by Contract or 
credit arrangement or otherwise.




     "AGREEMENT" has the meaning ascribed thereto in the introductory 
paragraph of this Agreement.

     "ALLIED" has the meaning ascribed thereto in the introductory paragraph 
of this Agreement.

     "ALLIED OPTION" has the meaning ascribed thereto in Section 2(a) of this 
Agreement.

     "ALLIED OPTION SHARES" means, collectively, the shares of Series C 
Preferred that are issuable upon exercise of the Allied Option.

     "BENEFICIAL OWNERSHIP" or "BENEFICIALLY OWN" with respect to any 
securities shall mean having "beneficial ownership" of such securities (as 
determined pursuant to Rule 13d-3 under the Exchange Act), including pursuant 
to any agreement, arrangement or understanding, whether or not in writing.  
Without duplicative counting of the same securities by the same holder, 
securities Beneficially Owned by a Person shall include securities 
Beneficially Owned by all other Persons with whom such Person would 
constitute a "group" as described in Section 13(d)(3) of the Exchange Act.

     "BUSINESS DAY" means any day on which the principal offices of the 
Securities and Exchange Commission in Washington, D.C. are open to accept 
filings or, in the case of determining a date when any payment is due, any 
day other than a day on which banks in New York, New York are required or 
authorized to be closed.

     "CLOSING" has the meaning ascribed thereto in Section 2(b) of this 
Agreement.

     "CLOSING DATE" has the meaning ascribed thereto in Section 2(b) of this 
Agreement.

     "CONTROL" (including the terms "CONTROLLED BY" and "UNDER COMMON CONTROL 
WITH") means the possession, directly or indirectly or as a trustee or 
executor, of the power to direct or cause the direction of the management or 
policies of a Person, whether through the ownership of stock, as a trustee or 
executor, by Contract or credit arrangement or otherwise.

     "DGCL" has the meaning ascribed thereto in Section 11(k) of this 
Agreement.

     "INVESTORS' AGREEMENT" has the meaning ascribed thereto in Section 5 of 
this Agreement.

     "MERGER" has the meaning ascribed thereto in the introduction paragraph 
of this Agreement.

     "MERGER AGREEMENT" has the meaning ascribed thereto in the introductory 
paragraph of this Agreement.

     "OPTION GRANT AGREEMENT" has the meaning ascribed thereto in the 
recitals of this Agreement.


                                     -2-



     "OPTIONHOLDER" has the meaning ascribed thereto in the introductory 
paragraph of this Agreement.

     "PERMITTED TRANSFEREE" means in the case of the Optionholder, (i) a 
spouse or lineal descendant (including by adoption and stepchildren), heir, 
executor, testamentary trustee or legatee of the Optionholder or (ii) any 
trust or estate the beneficiaries of which, or any corporation, limited 
liability company or partnership, the stockholders, members or partners of 
which include only the Persons described in clause (i) above.

     "PERSON" means an individual, corporation, partnership, limited 
liability company, limited partnership, association, trust, unincorporated 
organization or other entity or group (as defined in Section 13(d)(3) of the 
Exchange Act).

     "REGISTRATION RIGHTS AGREEMENT" has the meaning ascribed thereto in 
Section 5 of this Agreement.

     "SERIES C PREFERRED" has the meaning ascribed thereto in the recitals of 
this Agreement.

     "TAC" has the meaning ascribed thereto in the introductory paragraph of 
this Agreement.

     "TRUSTEE" has the meaning ascribed thereto in Section 3(c) of this 
Agreement.

     "VCI" has the meaning ascribed thereto in the introductory paragraph of 
this Agreement.

     "VCI COMMON STOCK" has the meaning ascribed thereto in the recitals of 
this Agreement.

     "VCI STOCK OPTIONS" has the meaning ascribed thereto in the recitals of 
this Agreement.

     "WILLETTE OPTIONS" has the meaning ascribed thereto in Section 2(a) of 
this Agreement.

     Section 2.  TERMINATION AND GRANT OF OPTIONS; CLOSING.

          (a)  Subject to the terms and conditions of this Agreement,
     immediately prior to the Effective Time, the Optionholder shall cancel VCI
     Stock Options to purchase 128,500 shares of VCI Common Stock, representing
     (i) VCI Stock Options to purchase 20,500 shares of VCI Common Stock at an
     exercise price of $3.1250 per share, (ii) VCI Stock Options to purchase
     22,000 shares of VCI Common Stock at an exercise price of $5.1000 per
     share, (iii) VCI Stock Options to purchase 34,000 shares of VCI Common
     Stock at an exercise price of $5.8438 per share, (iv) VCI Stock Options to
     purchase 27,000 shares of VCI Common Stock at an exercise price of $7.5438
     per share, and (v) VCI Stock Options to purchase 25,000 shares of VCI
     Common Stock at an exercise price of $11.05 per share (the "WILLETTE
     OPTIONS") and, in consideration for such cancellation, acquire a
     non-qualified option (the "ALLIED OPTION") consisting of the right to 
     purchase 10,000 shares of Series C Preferred at an exercise price of
     $543,634.30, subject to the terms and conditions set forth in the Option
     Grant Agreement.


                                     -3-



          (b)  The cancellation of the Willette Options and grant of the Allied
     Option shall take place immediately prior to the Effective Time on the date
     ("CLOSING DATE") of closing ("CLOSING") of the transactions contemplated by
     the Merger Agreement at the offices of Morgan, Lewis & Bockius LLP, 101
     Park Avenue, New York, NY 10178.

          (c)  At the Closing, immediately prior to the Effective Time, (i)
     Allied will deliver to the Optionholder the Option Grant Agreement, duly
     executed by Allied, evidencing the grant of the Allied Option and (ii) upon
     such delivery, the Willette Options shall be duly cancelled with no further
     action on the part of any Person and shall have no further force and
     effect, and thereafter neither VCI nor any other Person shall have any
     further Liability with respect to any such Willette Options.

          (d)  VCI shall take the necessary steps to cause the Willette Options
     to be duly cancelled in accordance with Section 2(c) above.

     Section 3.  REPRESENTATIONS AND WARRANTIES OF THE OPTIONHOLDER.  The 
Optionholder hereby represents and warrants to Allied as of the date hereof 
and as of the Closing Date as follows:

          (a)  The Optionholder has all necessary power and authority to execute
     and deliver this Agreement and to consummate the transactions contemplated
     hereby.  This Agreement has been duly executed and delivered by the
     Optionholder, and (assuming due authorization, execution and delivery by
     the Optionholder) constitutes a valid and binding obligation of the
     Optionholder.  enforceable against it in accordance with its terms, except
     as limited by bankruptcy, insolvency, reorganization, moratorium or other
     similar laws relating to creditors' rights generally and by general
     principles of equity.

          (b)  The execution and delivery by the Optionholder of this Agreement,
     the performance by the Optionholder of its obligations hereunder and the
     consummation of the transactions contemplated by this Agreement do not (i)
     conflict with or result in a violation or breach of, (ii) constitute (with
     or without notice or lapse of time or both) a default under, or (iii)
     require the Optionholder to obtain any consent, approval or action of, make
     any filing with or give any notice to any Person as a result of or under
     the terms of any Contract or other agreement to which the Optionholder is a
     party or by which any of his assets and/or properties is bound.

          (c)  The Optionholder is either (i) the record holder or Beneficial
     Owner of, or (ii) trustee (such trustee, a "Trustee") of a trust that is
     the record holder or Beneficial Owner of, and whose beneficiaries are the
     Beneficial Owners of, each of the VCI Stock Options set forth opposite the
     Optionholder's name on Schedule I hereto setting forth the exercise price
     thereof.


                                     -4-



          (d)  The Willette Options constitute all of the VCI Stock Options
     either (i) Beneficially Owned or held of record by the Optionholder or (ii)
     held in a trust to which the Optionholder is Trustee that is the record
     bolder or Beneficial Owner of, and whose beneficiaries are the Beneficial
     Owners of, such VCI Stock Options.

          (e)  Each Willette Option is free and clear of all liens, claims,
     security interests, proxies, voting trusts or agreements, understandings or
     arrangements or any other encumbrances whatsoever;

          (f)  No broker, investment banker, financial adviser or other person
     is entitled to any broker's, finder's, financial adviser's or other similar
     fee or commission in connection wit the transactions contemplated hereby
     based upon arrangements made by or on behalf of the Optionholder in his or
     her capacity as such.

          (g)  The Optionholder understands and acknowledges that Allied is
     directing TAC to enter into the Merger Agreement in reliance upon the
     Optionholder's execution and delivery of this Agreement with Allied.

     Section 4.  REPRESENTATIONS AND WARRANTIES OF ALLIED.  Allied hereby 
represents and warrants to the Optionholder, as of the date hereof and as of 
the Closing Date, as follows:

          (a)  Allied is a corporation duly organized, validly existing and in
     good standing under the laws of the jurisdiction of its formation.

          (b)  Allied has all necessary power and authority to execute and
     deliver this Agreement and to consummate the transactions contemplated
     hereby.  The execution, delivery and performance by Allied of this
     Agreement and the consummation by Allied of the transactions contemplated
     hereby have been duly and validly authorized and approved by all required
     corporate action.  This Agreement has been duly executed and delivered by
     Allied, and (assuming due authorization, execution and delivery by the
     Optionholder) constitutes a valid and binding obligation of Allied,
     enforceable against it in accordance with its terms, except as limited by
     (i) bankruptcy, insolvency, reorganization, moratorium or other similar
     laws relating to creditors' rights generally, (ii) general principles of
     equity, whether such enforceability is considered in a proceeding in equity
     or at law, and to the discretion of the court before which any proceeding
     therefor may be brought, or (iii) public policy considerations or court
     decisions which may limit the rights of the parties thereto for
     indemnification.

          (c)  No broker, investment banker, financial adviser or other person
     is entitled to any broker's, finder's, financial adviser's or other similar
     fee or commission in connection with the transactions contemplated hereby
     based upon arrangements made by or on behalf of Allied.


                                     -5-



     Section 5.  CERTAIN AGREEMENTS.  Immediately prior to the Effective 
Time, the Optionholder shall (i) become a party to that certain Investors' 
Agreement, dated September 24, 1998, as such agreement may have been or may 
be modified or amended from time to time (the "INVESTORS' AGREEMENT"), by and 
among Allied and the Persons named therein, by executing a joinder agreement 
and shall be deemed an Additional Management Stockholder (as defined in the 
Investors' Agreement) for purposes thereof and shall be fully bound by, and 
subject to, the provisions of the Investors' Agreement that are applicable to 
such Person, and (ii) become a party to the Allied Digital Technologies Corp. 
Registration Rights Agreement, dated as of September 24, 1998, as such 
agreement may have been or may be modified or amended from time to time (the 
"REGISTRATION RIGHTS AGREEMENT"), by and among Allied and the Persons named 
therein, by executing a joinder agreement and shall be deemed an Additional 
Management Stockholder (as defined in the Investors' Agreement) for purposes 
thereof and fully bound by, and subject to, the covenants, terms and 
conditions of the Registration Rights Agreement that are applicable to such 
Person.

     Section 6.  FURTHER ASSURANCES.  From time to time, at the other party's 
request and without further consideration, each party hereto shall execute 
and deliver such additional documents and take all such further action as may 
be necessary or desirable to consummate and make effective, in the most 
expeditious manner practicable, the transactions contemplated by this 
Agreement.

     Section 7.  CERTAIN EVENTS.  The Optionholder agrees that this Agreement 
and the obligations hereunder shall attach to the Willette Options and shall 
be binding upon any Person to which legal or Beneficial Ownership of any such 
VCI Stock Option shall pass, whether by operation of Law or otherwise, 
including without limitation the Optionholder's heirs, guardians, 
administrators or successors or as a result of any divorce.

     Section 8.  STOP TRANSFER.  The Optionholder agrees with, and covenants 
to, Allied that the Optionholder shall not request that VCI register the 
transfer (book-entry or otherwise) of any certificate or uncertificated 
interest representing any of the Willette Options, unless such transfer is 
made in compliance with this Agreement.

     Section 9.  RULE 145 AFFILIATE.  The Optionholder, if deemed by Allied 
in its sole discretion to be an "affiliate" for purposes of Rule 145 under 
the Securities Act of 1933, as amended, hereby agrees to deliver to Allied, 
on or prior to the Effective Time, a written agreement in form and substance 
acceptable to Allied, restricting the disposition of the Allied Option and 
the Allied Option Shares.

     Section 10.  TERMINATION.  In the event the Merger Agreement is 
terminated at any time prior to the Effective Time and the transactions 
contemplated thereby are abandoned, this Agreement shall terminate and be of 
no further force and effect.

     Section 11.  MISCELLANEOUS.

          (a)  All notices, requests, demands and other communications under
     this Agreement shall be in writing and shall be deemed to have been duly
     given (i)


                                     -6-



     on the day of service if served personally on the party to whom notice 
     is to be given; (ii) on the day of transmission if sent via facsimile 
     transmission to the facsimile number given below, and telephonic 
     confirmation of receipt is obtained promptly after completion of 
     transmission, provided that a copy shall be sent via certified mail, 
     return receipt requested, simultaneously with any such facsimile; (iii) 
     on the Business Day after delivery to Federal Express or similar 
     overnight courier or the Express Mail service maintained by the United 
     States Postal Service; or (iv) on the fifth day after mailing, if mailed 
     to the party to whom notice is to be given, by first class mail, 
     registered or certified, postage prepaid and properly addressed, to the 
     party as follows:

     If to the Optionholder       E. David Willette
     or to VCI:                   c/o Vaughn Communications, Inc.
                                  5050 West 78th Street
                                  Minneapolis, MN 55435
                                  Facsimile No.: (612) 832-3241

     If to Allied:                Allied Digital Technologies Corp.
                                  140 Fell Court
                                  Hauppauge, NY 11788
                                  Facsimile No.: (516) 232-5370
                                  Attn:  Chief Executive Officer

                                  with a copy to:

                                  399 Venture Partners, Inc.
                                  399 Park Avenue - 14th Floor
                                  New York, NY 10043
                                  Facsimile No.: (212) 888-2940
                                  Attn:  Michael A. Delaney

                                  and:

                                  Morgan, Lewis & Bockius LLP
                                  101 Park Avenue
                                  New York, NY 10178
                                  Attn:  Philip H. Werner, Esq.
                                  Facsimile No.: 212-309-6273

     or to such other address as the person to whom notice is given may have
     previously furnished to the others in writing in the manner set forth
     above.

          (b)  At any time prior to the Effective Time, any party hereto may,
     with respect to any other party hereto, (i) extend the time for the
     performance of any of the obligations or other acts, (ii) waive any
     inaccuracies in the representations and warranties contained herein or in
     any document delivered pursuant hereto or (iii)


                                     -7-



     waive compliance with any of the agreements or conditions contained 
     herein.  Any such extension or waiver shall be valid if set forth in an 
     instrument in writing signed by the party or parties to be bound thereby.

          (c)  The headings contained in this Agreement are for convenience of
     reference purposes only and shall not affect in any way the meaning or
     interpretation of this Agreement.

          (d)  If any term or other provision of this Agreement is invalid,
     illegal or incapable of being enforced by any rule of law or public policy,
     all other conditions and provisions of this Agreement shall nevertheless
     remain in full force and effect so long as the economic or legal substance
     of the transactions contemplated by the Merger Agreement is not affected in
     any manner adverse to any party.  Upon such determination that any term or
     other provision is invalid, illegal or incapable of being enforced, the
     parties hereto shall negotiate in good faith to modify this Agreement so as
     to effect the original intent of the parties as closely as possible in an
     acceptable manner.

          (e)  This Agreement, including all exhibits, disclosure schedules and
     schedules hereto, constitutes the entire agreement and supersedes all prior
     agreements and undertakings, both written and oral, between the parties
     with respect to the subject matter hereof and except as otherwise expressly
     provided herein.

          (f)  Neither this Agreement nor any of the rights or obligations
     hereunder may be assigned by either party (whether by operation of law or
     otherwise) without the prior written consent of the other party hereto.
     Subject to the preceding sentence, this Agreement shall be binding upon and
     inure to the benefit of the parties hereto and their respective successors
     and permitted assigns, and no other Person shall have any right, benefit or
     obligation under this Agreement as a third party beneficiary or otherwise.

          (g)  The parties hereto agree that irreparable damage would occur in
     the event that any of the provisions of this Agreement were not performed
     in accordance with their specific terms.  It is accordingly agreed that the
     parties hereto shall be entitled to specific performance of the terms
     hereof, this being in addition to any other remedy to which they are
     entitled at Law or in equity.

          (h)  No failure or delay on the part of any party hereto in the
     exercise of any right hereunder shall impair such right or be construed to
     be a waiver of, or acquiescence in, any breach of any representation,
     warranty or agreement herein, nor shall any single or partial exercise of
     any such right preclude other or further exercise thereof or of any other
     tight.  All tights and remedies existing under this Agreement are
     cumulative to, and not exclusive of, any rights or remedies otherwise
     available.


                                     -8-


          (i)  Notwithstanding anything herein to the contrary, the Optionholder
     does not make any agreement or understanding herein in his capacity as
     director of VCI and the agreements set forth herein shall in no way
     restrict him in the exercise of his fiduciary duties as a director of VCI.
     The Optionholder has executed this Agreement solely in his capacity as the
     record or beneficial holder of the Willette Options or as the Trustee of a
     trust whose beneficiaries are the Beneficial Owners of the Willette
     Options.

          (j)  Each party agrees to bear its own expenses in connection with the
     transactions contemplated hereby.

          (k)  This Agreement shall be governed by, and construed in accordance
     with, the laws of the State of New York (without regard to any conflict of
     laws provisions that might indicate the applicability of the laws of any
     jurisdiction other than the State of New York), except to the extent that
     the Delaware General Corporation Law ("DGCL") applies as a result of Allied
     being incorporated in the State of Delaware in which case the DGCL shall
     apply to the extent required under applicable choice of law doctrines.

          (l)  EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY AND UNCONDITIONALLY
     WAIVES TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING RELATIVE TO THIS
     AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THE MERGER AGREEMENT AND FOR
     ANY COUNTERCLAIM THEREIN.  EACH OF THE PARTIES HERETO ALSO WAIVES ANY BOND
     OR SURETY OR SECURITY UPON SUCH BOND WHICH MIGHT, BUT FOR THIS WAIVER, BE
     REQUIRED OF SUCH PARTY.  THE SCOPE OF THIS WAIVER, IF ANY, IS INTENDED TO
     ENCOMPASS ANY AND ALL DISPUTES THAT MAY BE FILED N ANY COURT AND THAT
     RELATE TO THE SUBJECT MATTER OF THIS AGREEMENT, INCLUDING WITHOUT
     LIMITATION CONTRACT CLAIMS, TORT CLAIMS, BREACH OF DUTY CLAIMS, AND ALL
     OTHER COMMON LAW AND STATUTORY CLAIMS.  EACH OF THE PARTIES HERETO FURTHER
     WARRANTS AND REPRESENTS THAT HE OR IT HAS REVIEWED THIS PROVISION WITH HIS
     OR ITS LEGAL COUNSEL, AND THAT HE OR IT KNOWINGLY AND) VOLUNTARILY WAIVES
     HIS OR ITS JURY TRIAL RIGHTS.  THIS WAIVER IS IRREVOCABLE, MEANING THAT IT
     MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING.  THIS WAIVER SHALL APPLY
     TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO
     THIS AGREEMENT.  IN THE EVENT OF LITIGATION, THIS AGREEMENT MAY BE FILED AS
     A WRITTEN CONSENT TO A TRIAL BY THE COURT.

          (m)  Notwithstanding anything in this Agreement or any other document
     agreement or instrument contemplated hereby or entered into in connection
     with the transactions contemplated hereby to the contrary, (i) the

                                     -9-


     obligations and liabilities of Allied hereunder shall be without recourse
     to any shareholder of Allied or any of such shareholder's Affiliates,
     directors, employees, officers or agents and shall be limited to the assets
     of Allied and (ii) none of the shareholders of Allied or any of such
     shareholder's Affiliates, directors, employees, officers or agents has made
     any (or shall be deemed to have made any) representations, warranties or
     covenants (express or implied) under or in connection with this Agreement.

          (n)  This Agreement may be executed in one or more counterparts, and
     by the different parties hereto in separate counterparts, each of which
     when executed shall be deemed to be an original but all of which taken
     together shall constitute one and the same agreement.

                             [SIGNATURE PAGE TO FOLLOW]

                                     -10-


     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date first above written.

                                            ALLIED DIGITAL TECHNOLOGIES CORP.



                                            By   /S/ Emily M. Hill
                                              -------------------------------
                                              Name:  Emily M. Hill
                                              Title: Senior Vice President - 
                                                     Finance
 


                                            VAUGHN COMMUNICATIONS, INC.


                                            By   /S/ E. David Willette
                                              -------------------------------
                                              Name:  E. David Willette
                                              Title: Chief Executive Officer


                                              /S/  E. David Willette
                                              -------------------------------
                                              E. David Willette

                                     -11-


                                     SCHEDULE I

                                      OPTIONS



                                    No. of VCI Stock                    No. of Shares of
                                  Options to Purchase                   VCI Common Stock
                                     Shares of VCI                Purchasable upon Exercise of     Exercise Price
         Optionholder                 Common Stock                 Each Such VCI Stock Option         Per Share
         ------------                 ------------                 --------------------------         ---------
                                                                                          
 E. David Willette                         1                                 20,500                    $3.1250

 E. David Willette                         1                                 22,000                    $5.1000

 E. David Willette                         1                                 34,000                    $5.8438

 E. David Willette                         1                                 27,000                    $7.5438

 E. David Willette                         1                                 25,000                   $11.0500



                                     -12-


                                                                       EXHIBIT A

                     STOCK OPTION AGREEMENT AND LETTER OF GRANT
                             PERSONAL AND CONFIDENTIAL

_______________, 1998

E. David Willette
[address]

RE:  STOCK OPTION GRANT

Dear Mr. Willette:

     In order to provide incentive to you to contribute to the successful
operations of Allied Digital Technologies Corp. (the "COMPANY") and its
Affiliates, and in accordance with the terms of the Option Termination and Grant
Agreement between you and the Company dated the date hereof (the "OPTION
TERMINATION AGREEMENT") and subject to the terms and conditions hereof, the
Company is offering you by means of this Stock Option Agreement (this
"AGREEMENT") a non-qualified option ("OPTION") to purchase 10,000 authorized but
unissued or reacquired shares ("SHARES") of Series C Preferred Stock, par value
$.0l per share, of the Company ("SERIES C PREFERRED").  Terms not otherwise
defined herein shall have the meanings ascribed thereto in the Agreement and
Plan of Merger by and between Twin Acquisition Corp. and Vaughn Communications,
Inc. (the "MERGER AGREEMENT").  This offer is subject to the following terms and
conditions:

     1.   NUMBER OF OPTIONS.  Subject to the terms and conditions hereof, the
Company hereby grants to you, as of the Effective Time, one Option to purchase
10,000 shares of Series C Preferred.

     2.   EXERCISE PRICE.  The price (the "EXERCISE PRICE") at which the Series
C Preferred may be acquired upon the exercise of the Option shall be $543,634.30
to be paid by you in cash or in surrender to the Company of shares of Series B
Preferred Stock of the Company, par value $.01 per share ("SERIES B PREFERRED")
or a combination of both cash and shares of Series B Preferred.

     3.   VESTING/EXERCISE PERIOD.  The Option shall be fully vested and
exercisable on the date of grant.  The Option shall expire on the tenth
anniversary of the date of grant unless sooner terminated pursuant to Section 5
thereof.

     4.   TRANSFERABILITY.  Neither the Option nor any portion thereof shall be
transferable by you other than will or the laws of descent and distribution, and
the Option may not be exercised by anyone other than you during your lifetime.

                                     -13-


     5.   SHARE REPURCHASE OR REDEMPTION.

          (a)  SALE EVENT.  If you undergo a cessation of employment during the
     term of this Option, you must exercise the Option within twenty calendar
     days of the date of such cessation or the Option shall be forfeited at the
     end of such twenty day period without any further rights therein, and the
     Shares you purchase (if any) will be subject to repurchase pursuant to the
     terms of Article IV of the Investors' Agreement, dated as of September 24,
     1998, as such agreement may have been or may be modified or amended from
     time to time (the "INVESTORS' AGREEMENT").

          (b)  SALE OF THE COMPANY.  Immediately upon the occurrence of a Sale
     of the Company (as such term is defined in the Amended and Restated
     Certificate of Incorporation of the Company (the "CERTIFICATE OF
     INCORPORATION")), you must either exercise the Option concurrently with the
     Sale of the Company or the Option shall be forfeited without any further
     rights therein, and the Shares you purchase (if any) will be subject to
     redemption pursuant to the terms of the Certificate of Incorporation.

     6.   MANNER OF EXERCISE.  You must exercise the Option in whole (not in
part).  You may exercise the Option only by giving the Chief Financial Officer
of the Company written notice by personal hand delivery to the Chief Financial
Officer or by registered or certified mail, postage prepaid, at the following
address of your intent to exercise the Option: Allied Digital Technologies
Corp., 140 Fell Court, Hauppauge, New York 11788, Attn.: Chief Financial
Officer.

     7.   PAYMENT OF EXERCISE PRICE.  If you exercise the Option, you must pay
the purchase price in U.S. dollars (by check).  In no event will any Shares be
transferred to you on the exercise of the Option until the Company has received
the full payment pursuant to Section 2 and until the provisions of Section 8 are
satisfied.

     8.   DELIVERY OF SHARES AND COMPLIANCE WITH LAWS.

          (a)  GENERAL.  The Company shall, upon payment of the Exercise Price
     for the number of Shares purchased and paid for, make prompt delivery of
     such Shares to you; PROVIDED THAT, if any law or regulation requires the
     Company to take any action with respect to such Shares before the issuance
     thereof, then the date of delivery of such Shares shall be extended for the
     period necessary to complete such action.

          (b)  LISTING, QUALIFICATIONS, ETC.  The Option shall be subject to the
     requirement that if, at any time, counsel to the Company shall determine
     that the listing, registration or qualification of the Shares subject
     hereto upon any securities exchange or under any state or federal law, or
     the consent or approval of any governmental or regulatory body, or that the
     disclosure of nonpublic information or the satisfaction of any other
     condition is necessary as a condition

                                     -14-


     of, or in connection with, the Issuance or purchase of Shares thereunder, 
     the Option may not be exercised unless such listing, registration, 
     qualification,  consent or approval, disclosure or satisfaction of such 
     other condition shall have been effected or obtained on terms acceptable 
     to the Company.  Nothing herein shall be deemed to require the Company 
     to apply for, effect or obtain such listing, registration, qualification,
     or disclosure, or to satisfy such other condition.

     9.   REPRESENTATIONS AND WARRANTIES.  You represent and warrant to the
Company as follows:

          (a)  AUTHORITY.  You have the requisite power, authority and capacity
     to execute and deliver this Agreement, to perform your obligations
     hereunder and to consummate the transactions contemplated hereby.

          (b)  INVESTMENT INTENTION; NO RESALES.  You are acquiring the Option
     being purchased by you hereunder for the purpose of investment and not with
     a view to, or for resale in connection with, the distribution thereof, and
     not wit any present intention of distributing such Option.  The Option was
     offered and sold to the undersigned directly and not by any form of general
     solicitation or general advertising.

          (c)  ACCREDITED INVESTOR.  You are an "accredited investor" as such
     term is defined in Rule 50l(a) of Regulation D promulgated under the
     Securities Act of 1933, as amended.

     10.  STATUS UPON ISSUANCE.  Upon exercising the Option and prior to the
issuance of the Shares by the Company, you shall execute and deliver to the
Company (i) written documentation satisfactory to the Company that, as of such
date, the representations and warranties set forth in Sections 9(b) and (c)
hereof are true and correct in all respects and (ii) such other representations,
warranties and other provisions as the Company may reasonably request.

     11.  ENTIRE AGREEMENT.  This Agreement constitutes the entire agreement
between the Company and you with respect to the matters contained herein.

     12.  BINDING EFFECT.  This Agreement shall inure to the benefit of and
shall be binding upon the Company and you and your and its respective heirs,
legal representatives, successors and assigns.  Nothing in this Agreement
express or implied, is intended to or shall confer on any person other than the
Company and you, or your or its respective heirs, legal representatives,
successors or assigns, any rights, remedies, obligations or liabilities.

     13.  AMENDMENTS AND WAIVERS.  This Agreement may not be modified or amended
except by an instrument in writing signed by the Company and you.  The Company
and you may,  by an instrument in writing, waive compliance by the other party
with any term or provision of this Agreement on the part of such other party
hereto to be performed or complied with.  The waiver by any such party of a
breach of any term or provision of this Agreement shall not be construed as a
waiver of any subsequent breach.

                                     -15-


     14.  SECTION AND OTHER HEADINGS.  The section and other headings contained
in this Agreement are for reference purposes only and shall not be deemed to be
a part of this Agreement or to affect the meaning or interpretation of this
Agreement

     15.  RIGHTS AS A SHAREHOLDER OR EMPLOYEE.  You shall have no rights as a
shareholder with respect to any Shares covered by the Option until the date of
the issuance of a certificate or certificates for the Shares for which the
Option has been exercised.  No adjustment shall be made for dividends (ordinary
or extraordinary, whether cash, securities or other property) or distributions
or other rights for which the record date is prior to the date such stock
certificate or certificates are issued Nothing in this Agreement shall confer
upon you any right to be in the employ of the Company or any Affiliate thereof,
or, if you are employed by the Company or any Affiliate thereof, interfere in
any way with any right of the Company to terminate your employment at any time.

     16.  FURTHER ASSURANCES.  The Company and you shall do and perform all such
further acts and things and execute and deliver all such other certificates,
instruments and/or documents (including without limitation, such proxies and/or
powers of attorney as may be necessary or appropriate) as either party hereto
may, at any time and from time to time, reasonably request in connection with
the performance of any of the provisions of this Agreement.

     17.  ACKNOWLEDGMENT.  You accept the Option subject to all the terms and
provisions of this Agreement.  You agree to accept as binding, conclusive and
final all decisions or interpretations of the Board of Directors of the Company
(the "BOARD") or any committee appointed by the Board upon any questions arising
under this Agreement.  You agree to consult your independent tax advisors with
respect to the income tax consequences to you, if any, of the Option and you
authorize the Company to withhold in accordance with applicable law from any
compensation otherwise payable to you any taxes required to be withheld by
federal, state or local law as a result of the Option.

     18.  CERTAIN RESTRICTIONS.  THE SECURITIES REPRESENTED BY THIS OPTION GRANT
ARE SUBJECT TO THE RESTRICTIONS, RIGHTS TO REPURCHASE AND TO REQUIRE TRANSFERS
CONTAINED IN AN INVESTORS' AGREEMENT, DATED AS OF SEPTEMBER 24, 1998, AS SUCH
AGREEMENT MAY BE AMENDED, MODIFIED OR RESTATED FROM TIME TO TIME (A COPY OF
WHICH IS ON FILE WITH THE SECRETARY OF THE ISSUER HEREOF).

     THE SECURITIES REPRESENTED BY THIS OPTION GRANT HAVE NOT BEEN REGISTERED
UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY STATE SECURITIES LAWS, AND
MAY NOT BE OFFERED, SOLD OR TRANSFERRED EXCEPT PURSUANT TO (i) AN EFFECTIVE
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND IN
COMPLIANCE WITH APPLICABLE STATE SECURITIES LAWS OR (ii) AN APPLICABLE EXEMPTION
FROM REGISTRATION THEREUNDER OR UNDER APPLICABLE STATE SECURITIES LAWS.

     You should execute the enclosed copy of this Agreement and return the
executed copy to Emily Hill at the Company as soon as possible.  The additional
copy is for your records.

                                     -16-


Sincerely yours,

ALLIED DIGITAL TECHNOLOGIES CORP.

By:
   -------------------------------

ACCEPTED AND AGREED TO:


- ----------------------------------
E. David Willette


                                     -17-