I was just looking over the G-Boxx thread when an idea hit me. A liquid drive system, the L-Package (I want to have something other than boxx at the end). So here is how I see it happening. Around the bottom bracket area have a sealed compartment(Main Drive Casing(MDC)) that houses the drive liquid (most likely some type of oil due to it being lighter weight than water and having a higher vaporization point than water) and an impeller with variable pitch on the blades to control the speed of the liquid. The MDC will have two hoses attached to it, one for fluid coming in and the other for fluid going out. These two hoses will be attached to the rear hub which has an impeller inside it that has fixed blades. The pitch on the MDC impeller will be controlled by an electronic 'shifter', which would probably be a potentiometer. As for batteries I think it would be easiest to have them attached on the frame in the same sort of style as the water bottle batteries for some light systems.