I imagine each of the sensors are binary - either picking up a signal or not - so it probably depends on what "speed" he has set the "knob turning" to be, and h

I imagine each of the sensors are binary - either picking up a signal or not - so it probably depends on what "speed" he has set the "knob turning" to be, and he sets it in the middle by holding on a sensor for a mid-range amount of time. Most fine precision motor skills are made with a orchestra of opposing muscle stimuli. It'll be interesting one day to see fully-integrated humans with these digitally controlled devices. I imagine the human brain will be easy to train to operate, say a cell phone, especially if it's integrated at a very young age.