Ag Streak, I see that you have fiberglass listed, but the tub looks pretty nice in ply! Is that a mold, or will you glass over the wood? Can't wait to see where this goes.
I've been thinking of old aircraft construction for a tub, wooden framework and doped fabric. Or canoe-like, with ply bulkheads, wood strips, and glass over the wood.
And in a straight-up thread redirection, can I get some opinions about whether crashworthiness is a consideration in a tub? It seems like not so much, much like a motorbike itself.