Some thing else you can do if the carb adjustment doesn't work and you have an extra channel. Install an onboard glow driver. You can make this yourself for about 10 dollars or less, all parts are available at your local radio shack. All you need is a length of push rod, a peice of wood, 2 AA battery trays, wired so the batteries are in parralel NOT SERIES, and 2 EZ connectors, a switch with the spring loaded arm and roller and some wire. If you don't have the extra channel for it you can set the servo up on a Y-cord and have it operate in the oposite direction of the throttle servo so that when you go back to idle it turns on the driver. I can give a more detailed discription if needed. let me know.