I've been having porposing problems also but find that using the little silver tas to hold the elevators down did the trick. I also had seriouse left turn troubles with one of mine even at full right turn on the tim. But using the silver sticky piece on the rudder and bending it almost full right did the trick. Flying in wind is a loser (literally). These things really need dead calm they are so light. I'll be removing the lower wing from one of mine. Hope all goes well. Earle