Foils
So with the PDR foils we used a special airfoil section and we provide you with a simple template so you can make an accurate shape.
Take a bit of time getting the shape and the finish smooth and your they will be close to equal to the best that money can buy.
The materials for the centreboard and rudder can be quite basic and cheap. We used finger jointed junk pine strips about 30mm (1 1/4 wide). Most of the load is carried in the layer of fibreglass that goes around the outside.