My GP14 used a headstock of spaced 3/4" mahogany, to allow for a kick up rudder. As I recall, the Snipe has a more or less spoon shaped "puddle" rudder foil which is typical of the time it was designed. The GP14 originally had similar, and now most racers have gone to a more high aspect rectangular blade. In any case, you could probably build your own headstock with pivoting blade. Gudgeons or pintle brackets with tangs that go along the sides of the headstock are readily available. If you need, I can get pictures of the wood headstock of my GP14. Aluminum side plates would also work, making a thinner headstock assembly.