Nude Mamba Monster...

[BrianG]

I would say so. If the "high power" brushed motor hookup method is the same as the MM (where you use all three motor wires as the negative wire, and use the battery positive for the positive wire), it would be good for around 600A!

Since a radio receiver simply sends 1ms-2ms pulses every ~20ms to the servos/ESC, all you have to do is emulate that. I've built a small circuit to test servos using a 555 timer, a couple of small caps, and a few resistors. The caps and resistors set the pulsewidth duty cycle and frequency. Quick and dirty for less than $10. Then, it would be a matter of using a potentiometer in place of a resistor to allow a variable output. The only thing I would be concerned about is throttle "drift" if the pot gets worn/dirty over time. I still have the schematic somewhere if you want it (just have to find it).