Geistware is right. If your CG is correct (way aft of where most people put it) your handling will improve in all areas except stall stability.

BTW, I have problems with cork-screw loops too. I have tried everything in the book. To get a very high level of flying precision, your airplane needs to be built at professional level accuracy. My airplanes are perfectly straight to the naked eye, but to precision instrument and measuring tools, I bet they look terrible. Just ask any F3A guy how much time the spend trimming a model. I bet it's more than most of us fly in a year (no joke). Oh yea, you will always have to compensate for wind. Even a small wind can cause a noticeable difference.


Good luck.