i use that fiber optic kill switch, its nice, has an led when power is on, i use it all the time, when i 1st set up my throttle linkage i couldnt get it to kill, even with the trim all the way down and using the throttle cut feature on the radio, it just kept idling, extremely low, but not stopping on its own, so that swicth came in handy, its the way i would go from now on, its easier than setting up another servo for choke, as long as you can reach the choke arm or set up a pushrod sticking out from the cowl to choke when you need it, (starting) then go with an electric type kill i'd say