One thing to check is that the airplane rolls straight. You should have a degree or so of tow in on the mains. Proper tecnique is to start the take off roll with full up elevator and as the throttle comes up relax the up elevator to neutral. Let the tail come up by itself and keep it straight with SMALL inputs of rudder. Put in just a little right rudder right as you come up on the throttle. Just like the real thing the model will take off fairly straight by itself, it gets squirrly when the pilot starts chasing it and overcontrols. Thats why I like to slow down the controls for TO and landing as it is so easy to overcontrol these airplanes. Proper crosswind technique is to hold the aileron into the wind and keep it straight with the rudder. On landing enough aileron into the wind to stop the drift and use opposite rudder to keep it straight. You just have to get that left thumb educated. Don