Update: Peter and I have been working on the software together, I'm the coder that presents him with a basic not well written piece of code to start with and he is the polisher and smart enough in that he can getting it all working with his WiTcontroller code. We spent about 4 hours working together testing on my end and programming on his end with me in the states and him in Australia yesterday. Hard to find a time where it works for us and one of us shouldn't be sleeping.
The result is the code is in the HandCab and working really well, as good or better than I'd hoped for. Fun to operate and a totally different feel than using an encoder or pot. Couple small fixes....reverse is fwd and fwd is reverse (should be a simple fix) and one braking delay needs fixing and that is about it. The 3 stages of delay/momentum (user defined) work really well both accelerating and braking.
I'll try and get a video up in a day or so with it in operation,
Sumner