When in put a 4C 91FS in the same airplane, I did lower the tank to about the same level as the carb. The problems seemed to go away but I have flown it only one day since and I didnt go 3D with it.

Will again try it in a month and if it works, I will tell everyone what needs to be done. Its a Flip3D /UCS 60 clone from Phoenix and I know a number of people on the field have it because of the way it flies but dont fly it because the engine issues or because its tail has a reputation for falling off if it is not strengthened with fibreglass cloth. Picture attached was taken on a day when I couldnt fly it further because the tail wheel broke during a dead-stick landing

Ameyam