dh, golf wishbones are different to passat wishbones. john is putting passat wishbones on his car. thats what im talking about. where you have welded your golf wishbones is the correct place.
re the bushes, ask yourself these questions
why can you buy polyurethane bushes for tt's?
are the standard bushes on an audi tt gonna be designed for A, road use (quiet, comfortable) or B, track use (noisey, bumpy)?
they will work better than standard mk2 bushes as they are designed for a heavier car, but its only the same as using the tt's spring rates or dampers. For a mk2 track car you still want stiffer than that.
you have found a nice upgrade for a mk2 owner who wants to keep a level of comfort though