|   My goal is the largest transportable boat at 10' to 12' wide on the trailer (no lead or tail "wide load" vehicles required), that can be folded safely while on the water, and trailered by two adults.

This is probably exactly my desire. I might add quick set up and take down. But that speed might come from refinement through experience.
I am hoping I can tag along with your mods to the EX40. I think it would be great for HP's to have a pair of sister HP's. Also, I don't know enough about sailing to know what I want, or where I want it, or why.

|   The proa would be much faster, safer, more seaworthy, and also less stressful to trailer with mast-raising assist poles that hoist the masts up at their center of gravity and allow you to drop them into their casings.  I like the mast-raising setup on the trimarans, but it only works on the trailer, and it involves huge horizontal stresses on the mast bearing in the early phase of raising it up. 

Perhaps Robs telescoping masts makes sense, as the masts can fit on the trailer. Also the shorter mast is perhaps easier to wield.

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