I love this combo!

First I sailed with Sonntag gps4 32 cm was fine but went there was the gusty I had to do more effortswith my legs to control the board. Then I tried the Hurrican fin. I losed early planning but I got more control and speed (2 Knots).

I've dicided to use Sonnag fins with 7m soft conditions and the Hurricane with hard 7m conditons :)