Hi Brian

He has some good basic ideas ,-

Interesting --the comment on hull shape if folding up another would be more of a G Cat form ,--narrower deeper v type hulls ,rather than the skeg type he built in place of boards ,-
much easier to fold up a basic rounded v than the more compounded curved hull , and the natural radius of a folded shape is always fast.
A number of cat builders back in the 80s folded up numerous A Class cats locally ,-then wanted flatter hull shapes than plywood fold up would allow ,--it only bends so far . They went to nomex cores after that and 18 sq meters which they thought would have a greater appeal to a wider variety of sailors ,---larger sail area 193 ,-and no beam limit .

How do you like your G cat hulls ,the deper V and no boards ,- It would be a simple type to fold up w plywd. for a 14 .

Just for fun ,-drew some basic hull lines for a tunnel hull design ,--tunnel each hull ,planning type hull ,
It has huge volume forward -flat bottom w chines ,canted ,
but would only be a flat water cat , the bows being very wide for the tunnel .