Joined: Jul 2015
Posts: 7,365
Likes: 3,217
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
in a pinch, i'd take some material off the cup with a lathe... or grind it on the flat side of a large bench grinder wheel, since i sold my lathe 20 years ago...