Here are the specs:
Board Type its a F2 Stoke 145 liters with a factory 48cm Fin (Power Box)
Board Lenght its 260, width 75, Didn't know the tail size
Sail Type it's Severne Gator 7.5
The conditions are normaly 15-20 knots, sea water, with little to moderate chops.
What about the "spinning", it normaly happens when I'm going upwind, and take a chop, It's that a signal of a fin lenght problem? Would I be better with a 50cm fin, and will get me planning early ?
Thanks again Roger