Kombat 122 fin range

[clay]

Hi everibody,

I've just bought a fantastic Kombat 122 and I'm pretty excited about it.
I use to surf at the lake with a wind range of 15-25 knots.
Sail from 6.5 to 7.5 only. I would like to have advice regarding the most suitable fin to use since I am experiencing some spin out when pushing to go upwind (I positioned the straps on the freeride mode, so double on the back and more external on the front).

So fin-wise I am using the orignal drake provided, what do you suggest specifically for freeriding?

Thx a lot and greetings from Italy
Fabio