They do fit under my OZ wheels!!!

Unfortunately, having spent about 5-6 hours fettling them to fit (I think the adaptor brackets I've got with this kit are absolutely shit!!! MDA Motorsport ones apparently) I've gone to refit the wheels only to find I need spacers to clear the calipers now!

They need around 10mm of spacing, which means I need longer wheel studs as well!

Gutted!