I feel sympathetic to that existential coyote in Tex Avery's cartoons, always busy tirelessly crapping out some new questionable device...and barely more successful!

Jay, Erez,

Some Inuit kayaks have so many chines that they look pretty like round-chined boats. See some Caribou, Copper flat water speed kayaks, Bering Strait, King Island, Kodiak, etc.
George Dyson's Aleutian kayak on this Guillemot site is a good example of an aluminium multi-chined construction.
Now, take-apart kayaks are generally hard-chined because multi-chined require too many stringers to assemble before paddling.
To make multi-chined yaks faster to assemble, you could tie several stringers permanently together with straps and fit them with snap-in connections into Polypropylene (or HDPE) gouged stations à la Feathercraft-Yost.
Another way, scarcely explored if at all so far, would be to skin panels instead of skinning stringers.
One of the Maroske brothers once made a Hartel replica that was essentially made of two large gunwales sweeping up, and a keelson protruding at bottom ends.
You could extend that method to the whole yak construction, Erez (especially as we remember the beautiful 3-elements take-apart you once built).
Panels would be connected on the inboard side thru wood horseshoes (see site Faltbootbasteln.de, Basteltips section) that are strong, light and proven, or any other connecting device such as wood blocks with wing nuts, or alu tube smaller sections sliding into larger tubes connected to the panels -btw, those tubes could also be used as...stringers to reinforce the panels and strenghten the hull lenghtwise, unless you replace them with ash battens glued and screwed to the side and bottom panels.
Panels could be all made of 3mm (1/8") thick ply or plastic sheets (provided you'd find panels both thick and light, which I doubt, except for the most curved or "tortured" parts of the boat like the chines and the bottom ends.
So could you get rounder chines on a kayak that could be packed into a caddy or a car, or even portaged along a river.
There's no problem in using alu, ply and pvc parts altogether in the same boat.
A polyester skin and hypalon could wrap this better to make the whole contraption waterproof.
A variant would be a classic Feathercraft-Yost structure with alu stringers, only the chines would have more stringers (14mm tubes could do) and would be fitted with thin plastic sheets turned over the stringers all along the middle part of the hull which is where you'd needed a round shape, or even further fore and aft, depending on the desired shape of bows. Those plastic sheets would have sleeves or overlaps glued to them on the inner side, and you'd just have to run the tubes into them when assembling, before skinning the structure.

Just my twopence.
Eric

: Jay,

: This practically sounds like a CHALLENGE to skin boat builders.

: Now Tom Youst likes challenges. I'd bet that if Yost ever reads this he'll
: have his hat off in a second, so he can scratch his head as he ponders how
: to build this with an aluminum/HDPE frame -- and he'd probably want to
: build it so it could be taken apart for trael.

: Of course at three other points around the world even more people now are
: probably contemplating ways to surprise you.

: You never want to say "never" around this crazy bunch of boat
: builders. They'll make a liar out of you every time.

: Love the boat. The design is great. And of course I just can't wait to see it
: rendered in fabric and sticks.

: PGJ