Botbitz 85a esc..... in a heavy?

[overkill]

In theory that will work and you wouldn't need such a large ESC to drive the outboard H-bridge. I tried that on a smaller scale and the PWM waveform out of the H-bridge looked nothing like the input - doing this probably needs an electrical engineer with experience in FET circuits. I would be very interested in any ideas for getting something like this to work!

I used the Wasp ESC from Robot power in my experiments: http://www.robotpower.com/products/wasp_info.html