Right just looked at mine again. Had a thought. As my bb is a gxp 68-73mm or whatever the measurement is could I not use the bb mounted chain guide.
I cant see a reason why I couldnt as I would be extending the bb whichis extendable and the crank axle remains the same whatever.
I wouldnt be affecting a chain line as there is only one ring at the front so no mech to worry about. Correct me if im wrong!