Exhibit 10.20 Citigroup Managed Futures LLC 399 Park Avenue, 7th Floor New York, New York 10022 June 13, 2003 Winton Capital Management 1a. St. Mary Abbot's Place Kensington, London W86LS, U.K. Attention: Mr. Martin Hunt Re: Management Agreement...

                                                                   Exhibit 10.20
                          Citigroup Managed Futures LLC
                           ▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇
                            ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇
June 13, 2003



▇▇▇▇▇▇ Capital Management
▇▇. ▇▇. ▇▇▇▇ ▇▇▇▇▇'▇ ▇▇▇▇▇
▇▇▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇ ▇▇▇▇▇, U.K.

Attention:  Mr. ▇▇▇▇▇▇ ▇▇▇▇

         Re:      Management Agreement Renewals

Dear ▇▇. ▇▇▇▇:

We are  writing  with  respect  to your  management  agreements  concerning  the
commodity pools to which reference is made below (the "Management  Agreements").
We are extending the term of the Management Agreements through June 30, 2004 and
all other provisions of the Management Agreements will remain unchanged.

o        ▇▇▇▇▇ ▇▇▇▇▇▇ Principal Plus Futures Fund ▇.▇. ▇▇
o        ▇▇▇▇▇ ▇▇▇▇▇▇ Diversified Futures Fund L.P.
o        AURORA 2001
o        SSB Orion Futures Fund L.P.

Please  acknowledge  receipt of this  modification  by signing  one copy of this
letter and returning it to the attention of ▇▇. ▇▇▇▇▇▇  ▇▇▇▇▇▇▇▇▇ at the address
above or fax to  ▇▇▇-▇▇▇-▇▇▇▇.  If you have any  questions  I can be  reached at
▇▇▇-▇▇▇-▇▇▇▇.

Very truly yours,

CITIGROUP MANAGED FUTURES LLC


By:   /s/▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, ▇▇.
         ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, ▇▇.
         Chief Financial Officer & Director

By:  /s/ ▇▇▇▇▇▇ ▇▇▇▇

Print Name:  ▇▇▇▇▇▇ ▇▇▇▇
DRMcA/sr