DC 700 Trapezoidal disallignment

[Codex]

Hello

I have a problem with a DC 700, my customer prints a lot of 330x480, and the prints seems to be ok in the first half of the sheet , but on the second half there is a kind of disallignment , the bottom looks stretched , so the edge of the print is almost at the end of the paper, more on the left side if you look on the sheet.I already made the allignment procedure with the Xerox Tool, and then again with the Command Workstation 5 Allignment tool, and everything seems to be ok, but if the customer prints (from every cassette), the copy is disalligned at the bottom.

[xcopytech]

Replace 2nd btr assy