I was expecting to see my oil pump disc holes peened by the tabs, and some sign the tabs had been smacking the walls of the holes, but everything on mine looked pristine. Maybe it is driving style. Maybe luck of the draw. The main thing is to eliminate the slop in the interface, so fat tabs in big holes or OEM tabs in small holes does the trick.The main thing is to make sure you've got a tight hole for whatever size unit you have.
Salty