Soup /diy/,
I'm planning on building a winter windsurfer using a snowboard and a windsurfing rig.
I just need some advice on what to use for the highlighted piece -- it needs to be strong, but not too strong that I can't drill into it to attach it to the swivel and bindings!
Also, what kind of thing would you recommend for a swivel? It needs to be strong, especially against torque (being pulled straight apart is not as much of an issue). Bonus points if it can only rotate through 180 degrees.
Oh, and an addition: it would be nice to have something slanted to attach the bindings to. The rider has to lean backwards to balance out the force of the sail, so it would be nice to have it a little bit that way by default.