AFAIK the PC XP still has a hollow shaft that can fracture and gouge the paint/metal/whatever. Happened to (the relatively MIA) Barry and he was really lucky he didn`t do any damage. Utter deal-breaker for me, besides how I found both my (pre-XP) PCs to be utter [crap] comared to my other polishers... in performance, build quality, you name it. Don`t plan to ever by another PC brand tool of any kind.