First I take out the idle screw and toss it in the trash... I set up my radio throttle curve to allow me to cut off the engine with trim. As happened, when the muffler is loose and hanging by one bolt, the engine went rich, and I could not go low enough with trim because of the low end point that I set. The solution for this problem is to drill and wire the muffler socket head bolts so vibration does not work the muffler bolts loose. The low end point of the throttle curve is just fine when there are no mechanical problems. As to the carb choke... I believe that I have a small air leak in the choke plate. I don't want to solder the hole closed...for a while, I used the choke/servos as an emergency kill, but it did not kill it every time. I still like having a choke servo combination... this is RC after all. The idea of doing everything remotely is an attraction to me. I would love to have a remote start (and will one day). I used to kill the gas engine with throttle trim, but having the kill switch makes it unnecessary and is also a test of the "emergency" kill switch on each flight. Using the kill switch saves me time adjusting the throttle trim before each flight.

I do think that having a kill switch makes flying safer and gives you one more option when things go wrong. A kill switch is not that much of a cost addition in my opinion. I understand but disagree with the other camp. When you get to 50 cc and larger, this small weight addition is of no concern. I will never have to fly my plane until the fuel runs out to land it. I absolutely believe in setting up the motor, linkages, radio fail safes and electronics correctly. Don't depend on any one system mechanical or electrical for an emergency. Do all you can to fly safely. You do need an available radio channel for this function.