[Tom Goldman]

I've seen the results from one that came apart shortly after it had been recertified.
The allen bolts that retain the ring gear failed and the ring gear came apart at the butt weld slicing thru the headers and frame rails of a roadster like the were made of butter.
Ive seen similar failures on steel wheels at the butt weld if it is not where an attaching weld is located ,but never with such devestating results.
I would never use one on my cars.