Fin making made simple

I 'stole' this from Hi-Shred, but in the spirit of backyard boards - and all surfboard building really from a rebellious and necessity vs invention stand point - this is classic advice:

"The fins are made with unidirectional roving-- one way strands. Saturate the roving, place it in a plywood female mold, cover it with a matching male insert, and jack up a vehicle over it to squeeze out the excess resin."

Now go make some fins!