I already said that I'm not an engineer
So what ever I write is not based on calculations.
I'm very curious as for hull shapes
I have been looking at the hull shapes of every beach catamaran I could find trying to figure out it's concept
and what the designer was trying to achieve,
The more I looked I was able to see things I could not see in the beginning.
I'm very excited about this Open Source Project and I can't wait to find out all the things I don't know that I don't know.
As for the hull width I suggest 0.4m where the water line is,
and then play with the deck width to achieve total hull volume of at least 600 kg.
more volume = more weight
carbon = less weight
carbon = $$$
However having said all this, I propose that is people are committed to canted hulls and daggerboards then lets open up a parallel design path where the alternative design has them. Then when both are done we can look at which is the most attractive when balancing performance potential to things like production considerations and cost.
We can design a part that will be placed between the hull and the beam and make the hull canted,
or not canted with a different part,
I am not talking about one part with two positions.