Do you even know how a NuVinci internal shifter works?
I encourage all of you to see how it actually works with this good animated video from Fallbrook Tech, the designers and makers of it.
https://www.youtube.com/watch?feature=player_embedded&v=cuedbYOxQi4
Besides the clever design of the rotating balls it's the proprietary tranny fluid made only for and sold to NuVinci directly, I know, I checked a couple years back when I was playing with them and wanted to see if I could just 'change the tranny fluid' in my hub and there is no access to do it or even check the level and I figure that was done on purpose much like Apple does.
Send it to us and we'll fix it with a complementary reaming.
Also note the only mention of any non-human power for N360 is electric and even then they urge very low power electric because again as mentioned they don't like the pulsing of a gas engine.
You can start with PHD's in fluid dynamics, chemical composition for the 'magic fluid', and engineering.
Then throw several million at the machines to build your design.
If you want to build something MikeD, make a 3-speed internal coaster brake hub with a big drive sprocket on the left so you could have here 3 speeds on a direct drive bike and forego a jackshaft ;-}