Hi, I just stuck a volt meter across the points leading to the motors then traced back through the circuit to see where pulses occured (which cause the whole tank to rock back and forth) when the K button was pressed. Soldered 2 wires on to the revers pulse then linked through a diode to the recoil motor. If you can tell me a quick and easy way to upload a piccy I'll get on to it.
regards HVI