The pic on the left shows the reason why such a short light pram does so much. Beam, and lots of it. The compound curve that results from the glued plywood planks, combined with the lightweight compound bar effect of the gunwale and inwale gives these lightweight hulls great monocoque rigidity.

This pic shows lay of 6mm ply planks well, as well as an appreciation of the seating.
Note the leeboard. This is weighted and is moved side to side depending on tack. Suggestion: Dagger Box! Unstayed sprit rig is good.

Not unlike Joel White's 'Nutshell' but with some differences. A pram like Haumble Bee or Feather, but fewere planks per side and chined.