[Al Skierkiewicz]

Matt,
Having worked through a problem with this design with a team at Championship a few years ago (it did not go well), I can only give you a few words of caution. It is essential that you provide for chain stretch. Chain stretches and it only takes a small amount to jump up during operation and lock the drive against the inside of the tube.
The second is a restating a post I made just a few weeks ago. If you want to win on Einstein, don't design something that can't be fixed in a few minutes with simple tools in near dark conditions.
Good Luck!