I've just taken the lock stops off Vamps BMW. It actually turns corners now.
The wheels don't rub, although the rear edge on full lock is only about
2mm from the arch liner, so I guess that's the problem. It has 215s on
8.5" rims, the absolute minimum you can fit, so putting 225 or bigger on (it has 225s on the back) will definitely rub without spacers.
Oh well, I guess I'll keep putting 215s on, unless anyone has some 5mm or so BMW spacers lying around?