Gee Tim, when will you start making yours?
Actually, some of the results that popped up looked like things I could just buy and either use with the right tuning, or tweak a bit.
The quadcopters need to be able to control motor speed pretty tightly, and if they're flying 3D they need to reverse direction to boot -- and they make it all work. The biggest problem is that most aerobatic quads aren't nearly big enough.