Any suggestions?

i find directional control is not great for windsurfing. Seems to want to turn upwind even with dagger board retracted
I suspect the fin - (10" Dolphin) provided with the board may be inadequate for windsurfing.
is it likely that thruster fins will help ?
any recommendations re fin size or make ?

otherwise I do love the board for cruising with a sail in lower winds and as an SUP

US box fin type in centre
Surf board style fin boxes for sides