Rob,
Would there be any mileage in using the WTW concept in order to have a reduced total width?
For example, your Elementary you used as a pacific proa. The addition of the camper ww hull would add to the righting leverage and would permit shorter cross beams.
The reason I ask is that the ability to have a 2.5m width helps enormously with launching and with using marinas. I have been looking at all sorts of folding systems as marinas in the UK are mostly multihull unfriendly which is why I had an F27 previously.
John
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