In reply to Andy and croc, here are a couple of shots of the modification I did to the selector housing after it cracked nearly right off, this method means it is not important to re-weld the alloy casting although it makes a better job if you do. You need to reduce the thickness of the gate bracket on the coupling side to allow the use of the original bolts, and to allow room for the coupling as it is very tight in there.
notice R/H gate support reduced in thickness, bolt thr