Hey gang, I know it's been posted before, but help me out. What seems to be the best way to bandaid the problem? I've got less than 20 miles on the bike and the inside edge of the subframe is getting chewed up from the chain (and yes it's adjusted properly) I'm thinking of a piece of thin stainless shim stock wrapped around the down tube for now. Down the road I'm thinking about adding a tall thin roller for the chain to ride against. Using the same idea as the esisting rollers. Any ideas.