Don't want to steal your thread but I'm having somewhat of the same problem,My fox 35 wants to die alot of the time when getting to the top of the loop or inverted.Need some possibles?I have been trying to richen it up and have played around with to different tanks and i can't seem to cure this, i hate crashing when its something like this.This is on a scratch built 400 sq in wing, home made uniflow tank.