Exhibit 10.21.1

                             AMENDMENT TO AGREEMENT


     THIS AMENDMENT TO AGREEMENT is entered into as of this 28th day of October,
2005, by and between UNION PACIFIC  RAILROAD COMPANY ("UP") and CXT INCORPORATED
("CXT").

     WHEREAS,  UP and CXT entered into an Agreement  dated January 21, 2005 (the
"Original Agreement"), pursuant to which UP agreed to purchase from CXT, and CXT
agreed to sell to UP, various types of concrete ties; and

     WHEREAS, UP and CXT wish to amend the Original Agreement.

     NOW,  THEREFORE,  for and in consideration of the foregoing  premises,  the
mutual promises and conditions herein contained, and for other good and valuable
consideration,  the  receipt,  sufficiency  and  adequacy  of which  are  hereby
acknowledged by the parties, the parties hereby agree as follows:

SECTION 1.        AMENDMENT OF ORIGINAL AGREEMENT.
                  -------------------------------

     Effective as of the date first written hereinabove,  the Original Agreement
is amended as follows:

    A.   Section 2.1 is deleted in its entirety and replaced by the following:

     "Section 2.1  Transaction;  Production  for Third  Parties;  Right of First
Refusal; Most Favored Nation Pricing. CXT agrees to sell to UP, and UP agrees to
purchase from CXT,  Ties upon the terms and  conditions  set forth  herein.  CXT
shall have the right to manufacture concrete railroad ties and other products at
the Plants for sale to third parties; provided, however that:

      (a)  such  manufacturing   shall  not  interfere  with  CXT  manufacturing
           Ties reasonably required by UP pursuant to the Annual Estimates (as
           such term is defined in Section 2.3, below);

      (b)  CXT may not sell  concrete ties produced at either Plant to any third
           party during any year unless it first offered UP an opportunity  to
           purchase,  at UP's sole election,  all or any portion of such ties at
           the Purchase Prices payable by UP to CXT under  Section  2.4 for Ties
           Produced at the Plant at which  such  ties  were  produced.  Any such
           offer  to UP (x)  shall be in writing,  (y) may  not be  made by CXT
           prior  to  October  31 of the  year immediately preceding the year in
           which the third party sale is proposed to take place,  and (z) if not
           accepted by UP within ten (10) days  following its  receipt  shall be
           deemed  declined  by UP.  The  parties  agree  that, notwithstanding
           UP's acceptance of

           an offer,  the volume of UP's purchases pursuant  to such offer may
           vary from it by up to ten  percent (10%) up or down;

      (c)  CXT may sell to third parties during any year only those ties, if
           any, that UP declined to purchase pursuant to Subsection 2.1(b);

      (d)  CXT shall give UP's then existing Tie production schedule priority
           over the production schedule proposed for any ties to be sold to a
           third party pursuant to Subsection 2.1(c); and

      (e)  should CXT sell concrete ties  manufactured at either Plant,
           substantially similar to any Tie (excluding  shoulders  and fastening
           systems), to any third party for a total price (including all
           rebates,  discounts,  service charges,  etc.) which is less (the
           "Lesser  Third Party  Price")  than the Purchase  Prices  (as such
           term is  defined in  Section  2.4,  below)  then payable by UP to CXT
           for Ties  purchased  at an annual rate of 300,000 Ties Produced from
           the applicable Plant, then (x) the Standard Tie Prices and/or Special
           Tie Prices (as such terms are defined in Section  2.4,  below),  as
           applicable, shall be reduced to the Lesser Third Party  Price  during
           the period of the  effectiveness  of such Lesser  Third Party Price
           and (y) the ties produced for such third parties shall count toward
           the  applicable per Plant Annual Minimum (as such term is defined in
           Section 2.3, below).


    B.   In the fourth and fifth lines of the first paragraph of Section 2.2,
         the words "December 31, 2009" are deleted and replaced with the words
         "December 31, 2010".


    C.   The third sentence of the first  paragraph of Section 2.3 is deleted in
         its entirety and replaced with the following two sentences:

               "On or before  December  1 of each year  during  the term of this
          Agreement  UP will  provide CXT a  non-binding  estimate  (the "Annual
          Estimate")  of the number of Ties  Produced  at each Plant  during the
          next  following  Program Year that it estimates it will  purchase from
          CXT. The number of Ties  actually  purchased by UP from either or both
          Plants during any Program Year(s) may, at UP's option, be more or less
          than the number estimated in the applicable Annual Estimate subject to
          such  Plant's  production  capability  during such Program Year or any
          subsequent  Program Year and after  deducting  sales to third  parties
          permitted under Section 2.1."

    D.   The fifth paragraph of Section 2.3 is deleted in its entirety and
         replaced with the following two paragraphs:

               "Initially,   the   updated   GI  Plant  was  sized  to   Produce
          approximately  375,000 Ties per year (31,250 Ties per month), on three
          production lines,  assuming 350 days per year of production.  CXT will
          add a fourth line at the GI Plant that will expand its Production to a
          minimum of 460,000  Ties per year  (38,333  Ties per  month).  UP will
          contribute  a total of  * of the cost to add the fourth line at
          the GI Plant (the "Fourth Line Cost") as follows:  CXT shall initially
          pay one  hundred  percent  (100%)  of the  Fourth  Line  Cost.  The GI
          Standard  Tie  Price  for  Ties  Produced  at the GI  Plant  shall  be
          increased  by a  surcharge  of * per Tie  until  the  total of such
          surcharges received by CXT equals *.

               "Prior to the  shutdown of the GI Plant for  installation  of the
          New  Technology,  CXT will  Produce  Ties at the GI Plant at a rate of
          24,000 Ties per month.  To provide a  "seamless"  supply of Ties to UP
          notwithstanding  (a) the fact  that the New  Technology  may not be at
          full  capacity  at the GI Plant  until  ten (10)  months,  subject  to
          extension  as  provided  above,  following  January 21,  2005,  (i.e.,
          November  21,  2005,  subject  to  extension),  and  (b)  that  it  is
          anticipated that the GI Plant will be shut down for  approximately two
          (2) months during the  installation of the New Technology.  During the
          period  January 1, 2005 through  December  31, 2005,  CXT will Produce
          and/or provide a total of 300,000 Ties for sale to UP as follows:

               A.       245,000 Ties at the GI Purchase Price will be available
                        at the GI Plant for shipment;

               B.       20,000 Ties Produced at CXT's plant in Spokane, WA
                        (the "Spokane Plant") which it will sell and ship to
                        UP fob the GI Plant at the Purchase Prices then
                        payable by UP to CXT for Ties purchased at an annual
                        rate of 300,000 Ties Produced at the GI Plant. UP
                        will have no responsibility for loss of or damage to
                        such Ties while in transit from the Spokane Plant to
                        the GI Plant as described above in this Section 2.3;
                        and

               C.       35,000 Ties at the GI Purchase Price will be
                        Produced and available at the Spokane Plant (the
                        "Spokane Ties"). The Spokane Ties may be purchased
                        by UP after CXT has produced the 20,000 Ties
                        described in Subsection B., above, subject to the
                        limitation that UP shall schedule its purchases of
                        the Spokane Ties so that it can purchase them based
                        on CXT's maximum Spokane Plant production rate of
                        10,000 Ties per month.


                  The Spokane Ties will be included for purposes of determining
                  the GI Standard Tie Price in accordance with Section 2.4(a),
                  below.
- ------------------------
*    Indicates the location of confidential data which has been omitted and
     filed separately with the Securities and Exchange Commission.


               E.       The following is added as a new paragraph at the end of
                        Section 2.3:

                           "If during any Program Year, both (a) UP purchases
                  300,000 or more Ties Produced at the GI Plant, and (b) more
                  than 375,000 ties are produced at the GI Plant and sold to UP
                  and any third parties, CXT shall pay to UP an amount equal to
                  $.50 multiplied by the lesser of (i) the total ties produced
                  and sold to UP and any third parties during such Program Year,
                  minus 375,000 ties, or (ii) the total ties produced and sold
                  to third parties during such Program Year."

                F.      Subsections (a) and (b) of the first paragraph of
                Section 2.4 are deleted in their entirety and replaced with the
                following:

                  "(a)  GI Standard Tie Prices: The GI Standard Tie Prices for
                  Ties Produced at the GI Plant during 2005 are the amounts set
                  forth below, adjusted pursuant to Section 2.4(f), below
                  (production amounts include Ties Produced for sale to UP):



================= ============== =============== =============== =============== ============== =============== ===============
    100,000          200,000        250.000        300,000 -       350,000 -        400,000        450,000      500,000+ Ties
  (minimum) -       -249,999     -299,999 Ties    349,999 Ties    399,999 Ties     -449,999     -499,999 Ties    Produced per
  199,999 Ties        Ties        Produced per    Produced per    Produced per       Ties        Produced per        Year
  Produced per    Produced per        Year            Year            Year       Produced per        Year
      Year            Year                                                           Year
- ----------------- -------------- --------------- --------------- --------------- -------------- --------------- ---------------
                                                                                               
        *               *               *               *               *              *               *               *
================= ============== =============== =============== =============== ============== =============== ===============


                  If during any year the actual number of Ties Produced for sale
                  to UP is less than the Annual Estimate for such year, as
                  modified by UP from time to time (the "Modified Annual
                  Estimate"), due to any failure on the part of CXT, the GI
                  Standard Tie Price for Ties sold to UP during such year shall
                  be calculated as if such Production were at the level
                  specified by UP in the Modified Annual Estimate. Any such
                  Modified Annual Estimates shall not exceed the remaining
                  monthly capacity of the Plant under Section 2.3, minus third
                  party sales commitments permitted under Section 2.1.

                  "(b) Tucson Standard Tie Prices: The Tucson Standard Tie
                  Prices for Ties Produced at the Tucson Plant during 2005 are
                  the amounts set forth below, adjusted pursuant to Section
                  2.4(f), below (production amounts include Ties Produced for
                  sale to UP):

- ------------------------
*    Indicates the location of confidential data which has been omitted and
     filed separately with the Securities and Exchange Commission.




====================== ================== ================= ================= =================
 100,000 (minimum) -   200,000 -299,999       300,000           400,000        500,000+ Ties
    199,999 Ties         Ties Produced     -399,999 Ties     -499,999 Ties      Produced per
  Produced per Year        per Year         Produced per      Produced per          Year
                                                Year              Year
- ---------------------- ------------------ ----------------- ----------------- -----------------
                                                                    
       *                    *                  *                 *                 *
====================== ================== ================= ================= =================


                  If during any year the actual number of Ties Produced for sale
                  to UP is less than the Annual Estimate for such year, as
                  modified by UP from time to time (the "Modified Annual
                  Estimate"), due to any failure on the part of CXT, the Tucson
                  Standard Tie Price for Ties sold to UP during such year shall
                  be calculated as if such Production were at the level
                  specified by UP in the Modified Annual Estimate. Any such
                  Modified Annual Estimates shall not exceed the remaining
                  monthly capacity of the Plant under Section 2.3, minus third
                  party sales commitments permitted under Section 2.1."


  F.       The first sentence of Section 2.6 is deleted in its entirety and
           replaced with the following:

                  "No less than thirty (30) days prior to the start of each
                  quarter of each Program Year UP will provide to CXT, and CXT
                  shall accept and honor, purchase orders for each of the Plants
                  for each month of such quarter."

  G.       The fourth sentence of Section 2.6 is deleted in its entirety and
           replaced with the following:

                  "Unless previously agreed to by CXT in writing, UP may not
                  issue any monthly purchase order for Ties in an amount in
                  excess of the applicable monthly Production amounts set forth
                  in Section 2.3, after deducting sales to third parties
                  permitted under Section 2.1."


         SECTION 2.        EFFECT OF AMENDMENT ON ORIGINAL AGREEMENT.
                           -----------------------------------------

                  Except as otherwise expressly provided in this Amendment to
Agreement, the terms and conditions of the Original Agreement shall remain in
full force and effect.

- ------------------------
*    Indicates the location of confidential data which has been omitted and
     filed separately with the Securities and Exchange Commission.


                  IN WITNESS WHEREOF, the parties hereto have set their hands on
the date first hereinabove written.




                                 CXT INCORPORATED


                                 By:/s/Stan L. Hasselbusch  (11/7/05)
                                 ------------------------------------
                                 Its: Chief Executive Officer
                                 ---------------------------------


                                 UNION PACIFIC RAILROAD COMPANY


                                 By:/s/Thomas M. Holmes
                                 ---------------------------------
                                 Its: General Director-Engineering Purchasing
                                 --------------------------------------------