I have been building the S2 suspension up on the car recently. When I first fitted the hubs up I had the caliper towards the front of the car the same as the ur quattro set up.

From looking at some pictures I realised this was the wrong way around. However running them with the caliper at the front pushes them forwards giving a little more caster. Has anybody run with them this way around? I cant see an issue with doing so and from having a quick play I cant see the wheel fouls anything even when on full lock.

This picture shows the offset ball joint hole which alters the caster of the hub depending on which side of the car its fitted to.