I went to adjust my front lift arms..because they seem to raise too high. I chk'd the lift manual and went to chk the pullies in the front. BUT...both were in the hole nearest the frnt...which..Iam guessing is the lowest adjustment. The back two arms are fine. All manuals say about making them lift higher..not lower. The door frame top towards the front of the unit is not flush with the roof, because of this. HELP!