It's not your calves, it's your shins, also triggers just relay your actual strikes to a module, they don't play those notes for you. I'd guess he's probably playing between 210 and 220 bpm sixteenth notes on the single so on the double it's equal to about 430 bpm sixteenths or more than 1700 strokes over a sustained minute. Sounds like a gatling gun, lol. I don't know why people would say that it's cheating, it's music, people, not sports. You don't cheat at music. I'd like to hear Tim Watterson play that rig, that would be awesome.