B.F. Avery's Tru Draft system was one of it's big selling points. You can check out this sales film strip to see the pitch:
https://www.youtube.com/watch?v=ufuRps3Z_qM
While the set up may have improved depth control of implements, it was hell on the tractor frame. This is really the only thing on this tractor that had been altered or worked on. The reservoir (pictured below) hangs on the outside of the right frame rail. It has an actuator, but an external cylinder was added by a PO for power, and like many of these tractors, the right frame rail cracked where it mounted to the transaxle from being torqued unilaterally. It had been re-welded...sloppily. Both lower frame rail mounting studs had broken. Only the right side had been replaced and it was with a larger stud. I pretty quickly decided that we were going to remove the lift set up. Mainly because I really want this thing to be dry when I'm done, and I'll never show it with the cultivators.