thanks for your responds.
Kicker ist may an issue. In very light conditions (F1) I need really a lot of kicker tension to flat out the diagonal wrinkles. I end up usually with too little twist - may be this is a general property of all unstayed rigs.
In more wind (F2 .. F4) I feel very comfortable whit the trimming - I can give all shapes into the sail. So far, I still hat o lot of free way at the cunni. But I never had more than a single F5 puff - so I have no experience how to trim in windy conditions.
Question: Is there any "trim tables" available for the aero? How do you trim your sail in light, medium and high wind for up- and downwind?
@ Sandy: I'm on Thunersee in Switzerland.