I have a big gasser plane I've been slowly rebuilding, the radio has been replaced (didn't have one) and all servo's are good to go.. my problem is with the ignition system. The plane has a cdi box in it with 3 wires on it, one goes to on/off switch but I have no idea where the other 2 wires are supposed to go. I'm assuming at least 1 must go to a power source to fire up the box but am unsure. Do I need a seperate power supply other than the radio batt? I'm sure I haven't given enough info but that's pretty well all I know Any info would be helpful, thanks...Chris