Daveperc - yes, OEM standard 19inch RS6 alloys and yes, K-F did double-check pressures and that they'd put them on the right way round!
All very strange.
The only think that may be a possibility is that I've currenlty got non-drilled front discs...perhaps the drilled ones have a slightly wider hub centre thingy that the wheel mates to, meaning that the wheels are a mm or two out toward the edge of the vehicle, therefore giving a vital few mm of clearance on the suspension arm?
I don't really know what I'm talking about though as I'm not a mechanic
At least I'm back on the road again
, albeit without the PS3's that I wanted 