So originally we thought the Honda bike had an internal belt-drive system, much like that used on snowmobiles (two cones that get closer together or farther apart, changing the effective diameter of the "gear" the belt is running on. Have you thought at all about doing something like that for your internal gearing? You could have a shifter with no indexing (I'm aware that friction shifters are many years behind us) and have an infinite number of gears. I suppose I'm asking because I have no engineering background (philosophy major...totally useful!). Kris suggested that if an 80 hp snowmobile engine can use a belt that is only 1.5" wide, a .3 hp human should be able to utilize a belt that is about a quarter of an inch wide, and small, lightweight cones. Thoughts?