Channel Bottom will almost always have a thruster fin set-up. A little less fin area will be a good call
because the board will have more hold than one that's unchanneled.
Convex Bottom then to be single fin boards most often and will want a flexible fin without too much
fin base. These board sit down in the water and like the power of the wave. Stiff large fins just wash out and make them feel rather dead.
Stay Stoked, Rich
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Custom Finmaker