Dan, I think the balsa skin & laid-up balsa rails is as strong as you’d ever need. I’m also discovering that S glass over light woods is much clearer than E glass, even of the same weight.
Oneula, this is baltic birch in 8’ x 12" pieces. So from the tip to the mahogany band is 7’7", the band is 5" and the tail birch is 4’ almost. The 2" “stringer” is also mahogany. I did spend some time both bookmatching the veneer pieces & laying up the mahogany for grain continuity. All the veneer is 1/16". I chose baltic birch because its known for accepting bends without too much splitting. Its what Ikea uses for all their bent-ply chairs, for example. The blank has a 3/4" redwood stringer buried down the middle and balsa rails under the veneer & d-cell. Without hotcoat, its about 18#.
4est, 3 5/8" thick at the center, 23" wide at -12", tail is 14 5/8", nose is 17 1/2". Tail rocker is late, about 4". Nose rocker is gradual, also finishing at around 4". So there’s a big sweet spot, centered around 7’ back from the nose, where the wp/hips are. I think finished wt. will be around 20#, less than the 10’ balsa longboard with 1/4" skin cores & balsa rails both buried in the blank AND built up.
The worst & most permanent trouble is that the birch is laid to another ply behind - both 1/32 - that is darker. So where I had to sand out wrinkles, and then lay over patches, and then sand the patches smooth, I have places where the darker stuff shows through. Looks sort of like grain, but not quite. I tried to match the patches to the veneer’s grain patterns but it didn’t always work out. The top entire sheet also slid a bit crooked in the bag which is why the “stringer” doesn’t meet the nose blocks perfectly symmetrically on the deck. It does meet correctly on the bottom. I also had to slit the veneer in a few places & inject in some extra resin where knocking produced hollow sounds. Again, I ran the slits along grain lines, but they’re a little darker than the real lines. Might do some pinlining 
and I guess wax on the deck will hide most of the trouble.
Meecrafty, that was Surfore. And yes, I did a lot of housecleaning, including putting the two benches together and leveling the short one up to the height of the tall one so I could put a board this long on them.
Oski is the Cal Bears mascot - since this thing is such a boat, I figured it’d work for a Bear…
