Thanks a lot. This has been very helpful. I have translated the web page and I think I understand most of it now.

I am concerned about my Heng long electronics though. They have been fried, so I suspect that perhaps only the heng long receiver is any good. When they got cooked all the functions where "on" turret rotating, gun elevating, airsoft cannon shooting, and the left track was full on, and the right track dead. This happened as soon as I switched the tank on, with no input from transmitter???

I imagine I may have to totally gut the electronics and replace them. That probably means getting a different transmitter and receiver as well. Too bad because I kind of liked the push button concept on the Heng long transmitter.