Our club president has an extra 300s with a quadra 75 in it and it has that feature. I don't think mine does with the Byro drive. can you hook that switch up to a servo for safety reasons? I am just getting into gasser motors and know very little about them. I do know that you should have a PCM reciever that has the capability to put the engine to idle or shut it off in case of an emergency, right? I have a futaba 7cap with that capability. Also I just purchased a Dave Patrick extra 330L with a 54cc taurus and a futaba 9cap and still haven't flown it. The guy that I bought if from flew it for me and it is a TRUE performer. Here is a picture of it.[img][/img]