I am riding 75 fanatic quad 2013, that i am really satisfied with. But sometimes i have a problem with a fin size. When it's super windy, (over 35 knts) board becomes unstable, very hard to ride. This is more like very steep on shore chop than wave, so more like a bump and jump conditions.
My thought was, instead of standard board quad set up which is 14.5 cm r, 9cm f, maybe increase size of the fins to 15 f, 9,5 or even 10 f, that i could pull on the sail, and press the fins hard to withstand the pressure of the wind, and sail up wind easier and faster? Is this theory ok, or i should contrary to that reduce the size of fins to smaller?