Justin, Don is the one of the ones having a problem. I think his spur gear is worn out and that is why his gear mesh sounded like a coffe maker even with a new bell. He nosed dived on throttle on the 40 foot double in Alabama the 1st 6 laps in a row during the A-main event.
The CEN bell has long teeth so that the gear mesh will line up with any engine and still make contact even with chassis flex. Why does having the bearing inset bother you lockmouth?
And what problem was your friend having? I have been using only Cen bells since August of last year with no problems until the Alabama race. If there is a problem, I want to know about it so that it can be fixed. I don't think there is one, but I just want to make sure since 2 guys in the last week have complained to me.