The reason I suggested filing only the non-drive side cup is that with your fixed cup without a lip, it doesn't sound like it would do any good to file the drive side, at least I think it would be more difficult to gauge how much to file off..........That does sound like an unusual fixed cup, in fact I don't see how it would really be a "fixed" cup without a lip to bottom against. You might try a different fixed cup, one with a lip, you might not need to file anything. If you do have to file it and you want to stay symmetrical, you could of course file equal amounts on both sides, but with just a couple mm I don't think it would make a noticeable difference-
Last edited by well biked; 03-15-07 at 08:02 AM.