HA! good one John!
Drawing 38, view A-A, when the control column is mounted, note that the sticks in vertical position should be centered in the cut outs on the F904 carry through top flange. Also, if you temporarily put the seat floor panel in place, the stick should be centered as well. The crotch belt bracket, is there a offset 'Left' & 'Right' (possibly mixed up)?
Per plans, WD610 is used on all the side by side models, 6, 7 & 9
dimensions so you can check your weldment:
Control stick pivot holes- center to center 17 7/8"
the big tube length should be 16 3/4" between the welds
Hope this helps
Maintain lots, upgraded & repaired some, modified more, rebuild a few, & built 4 of 'em