I was think to make some better dashboard, to fit nicely with throttle, and i think i will work on it bike ring bell. I buy 1$ ring bell and i remove all parts except finger thumb. That finger thumb i will use for analog throttle, im thinking to use hall sensor to read magnetic field or maybe i will use something other. In images bellow you will see how look PCB and how all that fit in ring bell.
I will make 3D print for cap of this ring bell because i want to use 3 buttons and display so all that will fit nicely inside.