Zmax,thanx for reply and sugestions.
I come from 13 years of Formula windsurf Racing and from experience i know that people dont like to share subtle and important infos.
Now im on kite racing equipment for one year,and i know that wery litle changes (like on windsurfing)in setings can make a big diference.
I understand that i will have to by 2-3 sets of fins and start to repot fins by my self if i want to make some decent progres in speed and upwind.
Thats all part of the game