I just installed my new disc cover (maybe I'll try to post a photo later today) and I'm having a bit of rear derailleur rub in my largest cog. I adjusted the limit screw, but in order to get it away from the disc cover the chain keeps on coming on and off of the cog. Any suggestions? Should I try to put the cover on again and see if it's any more snug? I'm also getting a little rubbing when I coast, but I'm not too worried about that since I shouldn't really be coasting during a flat 20k leg of a triathlon on Sunday. The disc cover is from wheelbuilder.com, so I'm assuming it's in good shape since from what people have posted on this forum seems, they do a good job on thier disc covers.

Adam