I think you need a wider BB. AFIK, the XT derailers are not such a good fit for the Sugimo cranks since they expect the wider Q from the Shimano modern MTB cranks.
A new compatible derailer from Riv would be the other option I'd suggest if you want to preserve the current BB. I would caution against doubling up the shim on one side. You'll loose the roundness of the internal surface and the pressure on the seat tube would be uneven. René -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.