Cant really comment or help you out much until we know what model plow it is, but either way, if you're even considering getting into "trailer plowing" I'd strongly suggest buying the "Deere Dealer Days Vol. 2" DVD that is currently out...I believe it may actually be discontinued, but I dunno for sure.
Either way, on that DVD is a 20 min video produced BY Deere back in the day which covers setting up, using, adjusting, everything with these plows.
The thing that I loved the most was unlike other manuals and docs I've read on adjusting plows, the Deere video covers adjusting the hitch when used behind fixed tread machines like a CUT.
Just took a look and it hasnt been discontinued...its part of Assortment #1: