I did put as much in my original power description: that it would develop to the point where his body would catch up with his mind. And that he would inevitably burn himself out from overusing it. That got approved. I'm not adding anything new, I'm just explaining how that works.

If you don't like it, then I'll amend it if you've got a better way of explaining how he [i]can[/i] move at super-speed without turning to mush. While being balanced of course :)