Not sure that this is much help at all, but I ended up using some chainring bolt spacers to push the chainring closer to the bike to get my chainline right. (Formula hub - 42mm chainline, if I remember correctly). --- This is the S300 Courier with GXP BB I'm talking about. I read somewhere that it apparently gives ~41 mm chainline, but mine didn't turn out as such (obviously), but that could because my frame alignment might off in the rear triangle.