Cat bulkhead design

Those are generous limits Montero. Here we get 5.5m & 5hp before the hand goes out for registration money, velocity limited to 10Kn also. Some are having custom decals made to detune their motors to 5hp, as it seems inspectors don't bother with model/serial details - see no evil.

I think you need to add speed requirements to your SOR, but if you keep your hulls skinny I can't see why you can't do better than average performance under most conditions.

Maybe take a look at Bernd Kohler's self aligning asymmetrical hulls? Might avoid the need for dagger boards.

Speed . Some ?
It'll probably be a poor boat in light winds, but fast with the engine(s).

I want to test relatively rough sailing conditions.

Test out some sails , wings and evaluate suitability on a larger scale projects.

Check the boat's ability to turn over after a capsize.
It'll be quite difficult to capsize.