Anyone using the Schlumph BB out there?
I'd love to go internal on my xtra but want the wider gear range. It just seems like a big mechanical installation and i'm hesitant.

Have you mated it with an internal rear hub? I like the idea of progressive gearing without lots of crossover gears. It makes sense to have a high speed and a slow speed.

Side question... i've seen pics of gear boxes for mtb bikes, 7 speed shifters that sit in the triangle and eliminate the derailer. I wondered why the conventional approach to gearing with cogs instead of a closed system in the same area. Seems like an internal hub would be a perfect prebuilt solution but i hav'nt seen any other attempts other than the schlumpfh. And they're just too hard to spell.