Good thoughts, all! I've also been told to check the prop balance...that maybe I'm just getting too much vibration. Might be something there as it looks the fuel is foaming. This is a profile plane with the tank exposed. All my other planes have had the tank in the fuse and I couldn't see the tank.....something else to check, I guess. I do have one very basic question that might pin it down. If you have a healthy receiver, should you be able to make things glitch by knocking on it with your knuckles. I'm inclined to think no, but I don't know. Maybe any rx will act up with some banging about. Thanks Folks!