|Echo what Michael said. I have micro slide switches in all my little engines and am not crazy about having to pick them up all the time to turn on and off. I have thought about reed switches but they are all either normally open or normally closed requiring a magnet to be present. One of the DelTang receivers has built in circuitry to operate with a reed switch. Otherwise it is necessary to have a separate switching circuit. Interested in what you are doing for sure.