Over the weekend I got a chance to install the RC-100 in my 40% Carden Cap with an older 3W 140. It's just below the most forward part of the canopy which is about 8" from the ignition module. I didn't build this plane, but the ign battery and throttle servo are within 6" or so of the module. Anyway, the switch works like a charm

I have it hooked to JR single conversion receivers, and activated by the snap button. I recently moved all my kills to the snap button and like it alot. The RC-100 is a keeper and I am satisfied. Thanks RCATS!