The 8 meter severne ncx on the kombat wasn´t a good match. I tried the combination using the original 30 Drake fin (I could not find any bigger US box fin here in Brazil). Maybe, just maybe, if a used a bigger one, it could have worked. The sail felt very unconfortable and unbalanced.
I´m still trying to get one of those True Ames (34).
The 7.5 and the 7.2 sails have worked better, indeed.