The next frame notch was a mess to cut, but ended up tight enough that the frame could support itself. A good sign, I suppose.
Note that the boat is...
Soaking in a wet towel and then pouring boiling water on them worked pretty well. The bilge stringers are wider, so I should have soaked/heated them...
A bit of progress. The molds are almost done, so I couldn't resist trying a very flexible batten in the notches for the sheer clamp. It'll need some...