My Futaba 7C radio has a spring loaded 2 position switch on the top left corner. It is usually used as the trainer switch. On all of my previous glow planes I set that switch up to fully close the throttle barrel on the carbs as a kill, so it is what I also assigned to my kill on my gasser. I like the fact that it is the longest switch on the transmitter, and in an emergency situation it is easy for my fingers to find. I can kill the plane without panicking and hunting for the correct switch, maybe that is because where its located, or maybe it is because that is what I am used too.

Some people will tell you that you dont want it on a spring loaded switch so you can leave the ignition cut off for safety reasons while tinkering with the engine, but I do not agree with that theory. The only ignition Kill I use for safety purposes when I am working on the plane is the switch on the side of the plane. You never know when you may bump a switch on the transmitter and not realize it, but I can always see the switch and LED on the side of the plane when I am down by the engine tinkering.

I have always set up my planes with manual choke, so I dont really have a suggestion for that one. I would set the radio up just like you do for all of your other planes regarding dual rates, flaps, landing gear, and lights then see what swiches are left over and choose one of those. I like all of the switches on my transmitter to do the same thing for all of my planes so you do not have to think about it while you are flying.