Well thanks for the info fellas. Like I say, I'm flying my 60 Mayhem with a 110FZ and it has power to spare. I can't get it to flat spin, upright or inverted because I can't get the throttle just right. It just blasts out of the spin before it flatens out. I know the Mayhem is supposed to flat spin all day long but I haven't been able to do one as of yet. It will knife edge very easily.