Eddie
I agree printed ABS isn't the ideal material, but it's not really under a lot of stress physically, it's just that ring it has to turn and it's not structurally related to the steering wheel's mounting. If I have any trouble with it I can have someone CNC cut it from aluminum or billet plastic like nylon / delrin / UHMW
Essdub. Yup I'm going to have a crack at it. Possibly going to use a little microcontroller with a wireless module to communicate the button presses to other devices. It may tie in with the plans I have for the stereo and dash cluster :)