Exhibit 10.12(a)
AMENDMENT NO.1
TO
AMENDED AND RESTATED CUSTOMER AGREEMENT
      WHEREAS, MORGAN STANLEY SPECTRUM SELECT L.P., a Delaware limited
partnership (the "Customer"), and MORGAN STANLEY
DW INC., a Delaware corporation
("Morgan Stanley DW"), have agreed to amend the Amended and Restated Customer
Agreement, dated as of the 16th day of October 2000 (the
"Customer Agreement"), by and
between the Customer and Morgan Stanley DW, to reduce
the monthly brokerage fee payable to
Morgan Stanley DW and to amend the address of the
 Customer and the address of Morgan
Stanley DW.
      WHEREAS, all provisions contained in the Customer
 Agreement remain in full force and
effect and are modified only to the extent necessary
to provide for the amendments set forth
below.
      NOW, THEREFORE, the parties hereto hereby amend the Customer Agreement as
follows:
1.	The monthly brokerage fee percentage of 1/12 of 7.25% (a 7.25% annual rate)
referred to in the first paragraph of Section 5 of the Customer Agreement is
hereby reduced to 1/12 of 6.00% (a 6.00% annual rate).
2.	The address of the Customer referred to in Section 13 is hereby changed to:
Morgan Stanley Spectrum Select L.P.
c/o Demeter Management Corporation
330 Madison Avenue, 8th Floor
New York, New York 10017
Attn:	Jeffrey A. Rothman
	President
3.	The address of Morgan Stanley DW referred to in Section 13 is hereby changed
to:
Morgan Stanley DW Inc.
330 Madison Avenue, 8th Floor
New York, New York 10017
Attn:	Jeffrey A. Rothman
	Managing Director
4.	The foregoing amendments shall take effect as of the 1st day of July 2005.



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      IN WITNESS WHEREOF, this Amendment to the Customer Agreement has been
executed for and on behalf of the undersigned as of the 1st day of July 2005.

MORGAN STANLEY SPECTRUM SELECT L.P.

By:	  Demeter Management Corporation,
	  General Partner

By:	/s/  Jeffrey A. Rothman
	Name:	Jeffrey A. Rothman
	Title:	President

MORGAN STANLEY DW INC.

By:	/s/  Jeffrey A. Rothman
	Name:	Jeffrey A. Rothman
	Title:	Managing Director
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