Boxter done and returned to the garage floor only to have no reverse! Slap it back on the lift whilst Alex looks online for similar and finds four straight away but no obvious fox explained. I took the shield off the linkage and wiggled it a bit and sure enough it finds reverse, so figure the change of box needs about 2mm on the drop link ball joints, of the side to side shift. Removed the bracket from the bottom of the gearbox, added two M6 repair washers to each and reattached, all good, put the shield back on and drop the car again. All sorted and a good shakedown drive later, we are cleaning up the garage.