Belt Tensioner - Reset Arms

Hello, I recently built a Simhub Belt Tensioner I love it!.  Normally, feedback is great - except if things get really hairy (crash) etc.  And the accelerated stepper movement will occasioionally 'pop' or lose steps. (might be because I'm leaning forward at that moment, etc). I was thinking if I had a programmable USB key (like a single key on a keyboard)  Many options available @ Amazon for example.  If the software had that feature I could mount that on my dash and when I press that button it would tell the arduino to stop sending feedback data to the arduino, repark the levers and reset '0' point then start resending data.  

Thanks!