Eight clamps

This is a photo of the aft end of the lower port stringers where they meet the transom. Where the support structures of the side of the boat meet the back of the boat.

They twist in all three dimensions! (Four, I guess, since they started out not nearly as twisty and have assume their corkscrew shape over time.) This is why I had to use limber fir instead of strong but brittle yellow pine for these stringers.

And the clamping. Complexity incarnate. The lack of right angles and things to clamp to means you have to get creative. Some of these clamps are only there to hold other clamps in place! Eight clamps to hold pieces of wood to other pieces of wood.

But it held, I predrilled, glued, and screwed, and the epoxy is curing as I type this.