I haven't tried it, though it intrigues me to no end. The catch, however, is in finding quality, inexpensive plywood
. For at the moment, even with a bulk discount price
at places like say, Edensaw Woods, 3mm ply of any quality isn't cheap
. And when you figure the numbers, you don't save much in a build, by using CM over say infused foam. And the latter boat/construction method will have a MUCH higher resale value, in addition to being a good bit lighter weight wise too.
Which kinda' has me PO'd, as I'd love a mid-sized cat which was both easy, and, inexpensive to build. - If you run across a good source of inexpensive ply, I'd surely appreciate hearing about it (a PM or email).
I will say that Kurt's flexibility (and spreadsheet for) substituting different materials for various components of the boat is a NICE option to have. It could save you a lot of $ & weight.
Anyway, back to CM, there's a decent amount of info from guys having built some of Kurt's boats, over on BoatDesign.net
Also, I haven't had time to dig around another site yet, but it seems to be primarily for Catamaran
(Multihull) home builders DIY-Yachts.com - Amateur Boat Builders Community - Home
And again, if you run across good links to materials, & or information on these topics, I'd love it if you'd pass them along. Ditto on anything else of substance which you find on the topic.
Plus, there's a flipside to the above request. If you do decide that you're going to go the DIY route
(especially on a multi), I have a fair number of links to sources for materials & sailing hardware
at, shall we say, better than average prices.
Dare I ask which design(s) of his you're toying with building?