same here...just as PCM said. That JR Charge switch is a good switch for this purpose. The throttle butterfly on the 50 should also kill the engine if set to close all the way when the trim is pulled all of the way back. Alot of guys use that charge switch for the IGN and have had sucess with it. That's the main reason I use it, is because it has been proven over time to work well. Be sure to wire it correctly, and put it in a place where your helper can see it, and can get to it quickly if needed. I like to put mine on the left side of the airplane as close to the cowl as possible on the side of the fuse. It's good and solid there because that first former is strong. While it won't destroy the bank account, it's not the cheapest switch either, but you want reliability there as this item is not just a on/off switch, but a safety item as well.