I flew mine for 10 months before I put it in just today. I dumb thumbed it. Had a TT 61 in it spinnin a 14x4. The plane was a dream to fly, never had a day of trouble. It did all the 3D. Also had a 1400Mah battery sitting just in front of the servo tray and a 14oz fuel tank. Didn't have a piece of lead in it. Why you would want to put such a large engine in it I'll never understand but good luck, its a heck of a plane.