Hi Allen! Just curious, have you ever run the engine before? Not to come against Randy, why spend the money when you could easily lock the throttle open using the throttle set screw. Personally, I have found them to be very strong, reliable engines that run very well at full throttle. As a result, I just lock the throttle in the wide open position and run them like that. I have them locked open on a couple of my Ringmasters, as well as twin OS. 25 r/c's, locked open on my Grumman Albatross and two Enya .09's locked open on my Lockheed SP-2H Neptune and an OS .15 r/c locked open on my Perky! I've not had any problems performing any suitable stunts or maneuvers as appropriate for the specific plane.