RE: Battery & balance
Mr. 1932, you’re playing Russian roulette any time you comingle your radio system with your ignition system. You can get away with it for an awful long time but one of these days it may catch up to you. Do it right the first time. Keep every thing separated as far as possible and never use metal pushrods to the engine. I am sure your RC instruction manual emphasizes this.
Summerwind, this is an old subject. There is no such thing as shielding and it should never be needed if good RF techniques are followed during the installation.
Dan.