Would a stiff VC cause scrubbing on all 4 tyres? I ask because when I got her home(on a trailer) and had a better look at stuff, the two rear tyres were worn on the inside edge, quite badly. I guessed the tracking was out at the time and the front tyres had been swopped with the rears ? So the front tyres looked good(easy to see them with lock on) and the worn fronts fitted with the baldy edge nearest the rear diff, not easy to see.