An interesting note to add:. At the last contest, it was called to my attention that I did not seal my aileron gaps. (I do on my fast planes). I did so last week and found that I had to remove about 10% on the rates for aileron. (Roll rate was now too fast) Also the elevator sensitivity went up, and I did not seal those gaps! It was like flying a different airplane, not in a good way, Either the sealing affected the trim to some extent, or the turbulence by having gaps softened the elevator response. IDK. I was able to move the C/G forward a bit to soften the elevator up, and that also helped with tracking. Trimming is so much fun.