I simply crimp the electrical wires to the stainless steel wires and shown in my book (see link above) and have never had a problem with lines since the only thing being transmitted is a signal and ground down the lines. The battery power in the controller has it's own power and has a common ground with the airplane power system. The model and the controller share common ground, the controller sends a signal to the airplane.

I use to have a Bill Young handle, but now fly with a JR radio in DSC mode, or a servo driver for single channel. If 2.4 Ghz passes then I'll pull the down the wire electronic controls, install the tactic 2.4 ghz reciever and switch out to new flying lines.

I have my 2.4 Ghz test airplane almost ready for flight test

Fred C.