Anybody know the diffrence between a RCH54-23BX and RCK54-22BX. I picked up a used RCK54-22BX deck off a BX2200 assuming it would fit my BX1850. I did not realize there was a diffrence until I tried to install it on the tractor. Most every thing seems to line up but the lift arm attachment points are a few inches too narrow. I guess I could reweld them in the proper position but also noticed the clearance to the anti-scalp weels is close. Any comments.