Golf GTD Mk7
My DS2500's squeeled like crazy even without shims - found out they were rather glazed over!! Since rubbing down they are almost squeel free
I think that's what's wrong with mine to be honest. They have plenty of clearance now and squeek more than they used to, but I have done a few track days, so it might be worth trying to remove the glaze really.
Speaking to Chris a while back now and he said that the scooby forum aren't a fan of the ds2500s for this reason. When they work properly they are great pads though