Ouch. Yeah, one of the dangers, perhaps, of making the crown race so much thinner. Or, trying to force it on. BTW, SJX, I have read the max interference should be .1 mm. But I'm not sure. Is that the same as two thou?
FWIW, here is one with the circumferential groove, which the seller sez is Triomphe. I know not.
http://www.ebay.com/itm/CAMPAGNOLO-T...item3a8514083b