Finsize for speedsurfing with Sonic 95 (2006)
I have recently bought a Sonic 95 (2006 closesout) for speedsurfing with medium winds. The stock fin supplied with it is a 32 cm Drake / Deboichet.
I suppose the stock fin is optimized for medium windrange of this board, and for figure-8 slalom. For speedsurfing getting onto the plane and upwind is less relevant. I want minimum resistance.
OTOH; there is a minimum finsize for each board. Smaller, and you don't get faster. The boards doesn't unwet enough, doesn't run high enough.
What is the minimum finsize for the Sonic 95; i.c.w. 5.5-6.5 racesails?
30 cm? 28 cm?