i use back as on. simply because i cant switch it off if i hand launch. Also, if i have a switch on the inside witht eh piano wire to switch on/off its IN for ON. its simply so when i carry the plane out, or i hand launch a plane, i cant just switch it off by accident for it to go for miles and crash. Some people say that if you have the in for off you could nock the switch and drain your battery. well, id rather have a flat battery and re charge it than a smashed up plane