The switch is to isolate the right hand track motor so that you can rev the engine with proportionate smoke effect while the Panther sits there motionless. It's really for me and my filming techniques and has not been specified by the owner, but can be removed easily, or converted to an rx switcher for remote operation if required ( whilst showing you could pull up and switch the motor off and produce sound and smoke to your hearts content if you wish).
I will use this function to record some gear changes for future video editing.
cheers Phil.
