Pretty odd thread, but it zig-zags in an interesting way.
About bamboo, I've seen photos of it used for crossmembers on amas (outrigger hulls) and for masts and spars. Also for scaffolding on construction projects, house framing, et many ceteras. Neat stuff, about which I know very little. But the arrangement of longitudinal fibers in a woody matrix is similar to carbon fiber layups. Seems like a lot of products made of laminated bamboo are coming on the market.
On the sailing rig, my first setup was a pivoting centerboard with a loop of shockcord up top so if I hit a rock it'd spring up. Worked so-so. Then I built two pivoting leeboards (also paddle blades). That seemed a bit better, perhaps because when the thing was heeled there was more blade in the water. (Naturally, I'd raise the foils to go downwind.) Still, it didn't maintain hull speed well enough to tack— I could get over maybe two times in ten.
Paddle blades aren't the right shape for underwater foils, of course, but the idea was to figure out a sailing rig that used paddle shafts for a mast and spars, and blades for a rudder and foils, so I wouldn't have to carry a lot of extra stuff. It did go upwind although you couldn't sail close hauled— it took constant trimming up and pinching and bearing off. Plus laying across a pair of cat tubes is uncomfortable as hell.
Here's a photo of it with a gaff rig and the pivoting leeboards. Not much sail area. I also made a wee jib for it— sort of a handful to manage two sails plus the leeboards and rudder.