I am currently building a Dynaflight Decathlon. I decided to put a Flashing LED (available from Radio Shack) in the Vertical Stab. The LED requires 2-5 Volts. I have hooked the LED to the same circuit as the electronic ignition for the 3W-24. The LED draws 50ma. I now can be sure that the ignition is off by observing the light in the tail. Looks pretty cool too!