Re: belt drive, maybe?
I am impressed.!! You are moving the right direction to a well mounted and beefier set-up. The belt is a lot (I think 5 times) wider than GEBE and that adds a lot of durability to the system. I love the use of a hub brake mount to mount the drive gear. That won't be getting loose with no resolution but a new plastic drive ring. You just need to Loctite the hardware and check tightness every now and again.
LennyHarp of Lenny's Bikes & Things
The true value of a man is not judged by what he has, but rather by what he can do without.
"We are what we repeatedly do. Excellence, then, is not an action, but a habit." -- Aristotle