I never said a crosswind makes the model yaw .Your last sentence here proves my point. The airplane drifts with the wind, the only way to correct this is to apply a force equal to the drift. Two options, drop the wing on the side the crosswind is coming from ( downgrade ) or apply a small amount of rudder to that direction. You need to hold the rudder because the crosswind does not magically go away once you establish a line, as soon as you neutralize the rudder the airplane will begin to drift again even though it holds the same heading. You seem to be getting confused between heading and ground track. As we are piloting from the ground with the judges sitting behind us we are concerned with ground track.