I recently built up a fixed gear bike from an old repainted steel frame. Its always been a problem but it is now becoming more and more annoying. Anyway, the problem is one of my rear fork ends/dropouts is not the same shape or angle as the other; this causes my rear wheel to be out of true almost all the time which causes huge problems with the chain because the tighter the axle bolts get, the further left the wheel goes. As you can see, the hub doesnt sit flat on one side. Any suggestions how to fix this?