Is it feasible that the unipivot arm bearing wearing in defeated the need for the A/S?I certainly hope not. Tonearm bearings should not wear in any detectible way for many years, if not decades. If it wore that much in just 100 hours, it would soon become completely unplayable.
Stringreen, I agree with your comment to Tbg, but you're about 4 years too late. ;-)