Smallwheels, I'll be waiting to hear your GEBE story.
Summer's here, so I'll have extra time for my bicycle projects until night school starts in August.
I've purchased the GEBE drive ring, so that's a start. I already have the BMP driveline and have found two online stores with $10 HTD pulleys and $11 belts. Just need to find the right pulley with 1/2" bore diameter. If I'm lucky and the OD is less than 1.375", I'll be able to remove the assembled driveline from the friction housing in one piece.
So far, this prototype should cost less than $100, which is a pleasant surprise. It can also revert back to friction drive at no extra cost.
That's freaking awesome!