You want to sell me your hardware? Make a replacement for the mouse. Something so that I can just move my hand around without holding anything, and the mouse responds appropriately on screen.
Make it so I don't have to lift my arms all the way off my desk (don't laugh, you'd get tired in 10 minutes) and can use minute movements, and I'll sign up for it on day one. Hell, I'll even Kickstart it.
The mouse is the most unhealthy device invented since the fucking cigarette.