I dont see how this would work? The gear controller provides power to the steering servo? Or do you need to make up some sort of y harness for power? Doesn't make sense.. I have read everything i can find on these and see no mention of anything about not running receiver power in the servo inputs.

As far as a power switch, if you dont have an on off switch to the battery it will probably run the pack dead and ruin it within a few days.

What are you putting them in? I am looking ordering a set for a carf tutor.