Hammerhead;
I made a frame (3 U shapes) out of 1/8 plywood, and covered it with thin balsa plank....then laid 2 layers of fiberglass cloth inside/outside...and started sanding. Once it looked about right, I slapped a little more fiberglass on it, sanded and painted. (after glueing the fiberglass/balsa vents on...)
It's surprisingly strong and light too.
Hopefully, I will be posting 'action' shots soon.