so what's the difference between two piece cranksets and traditional? And suppose I do buy a 73mm BB will spindle length effect the chainline? I want to try and avoid having a shop do all this just because I enjoy doing it all myself. The only thing I'm gonna have the shop do is install the fork but if the drivetrain is a major pain I may have to have them do it. But I haven't thrown in the towel just yet. I'm trying to get a grasp on all the specifics of the drivetrain, it seems pretty complicated though.