It is recommended that you convert to the "Snap-Coupler" setup, for safety reasons..
The only time I have found it necessary to remove my PTO (WD-45), is for the AC Sub-Soiler... I broke one PTO carrier bearing mount with the Sub-Soiler ( got lazy and thought I could get by)..
The rear wheels are not set "All the way IN"for the 3-14" mounted plow.. They are set at the 1st stop out, from all the way "IN"..with a Stop on either side of the wheel eccentric lock..(Both left and right wheels). The Pull-Type plow depends a lot on how the Plow Hitch is set, as to where the rear tires need to be set..