I have a problem "dialing" in my chainline. I have a UN-72 BB with a non-ISCG chainguide. I believe a truvativ. I still run a square taper crankset as this is what came with the bike. Well, when I shift the rear der. into the largest ring in the back, it really drags on the chainguide, thus requiring more work by me. anyway, is there a way to bring the line of the crankset inward a little more in order to line up the chain correctly in order to reduce drag.