Buest Guess is a 20 foot plywood/epoxy trimaran that I desgned and built in my garage. My goal for this boat was to be safe, dry and fast. Sailing in the northwest can be cold and dangerous. Water temps average in the mid-50s and swells can be large in Puget sound and Hood canal. My canoe trimaran was not dry and was marginally safe. Its amas provided floatation, but the aluminum canoe wouldn't, even though there was some foam in the bow and stern.
Buest guess is a flat-bottom "V" design, with scoop and rocker intended to allow it to plane in high winds. After a season or so of use now, it has proven itself to indeed be safe, dry and fast. We've had it planing (really) with 2 people in 15 mph or so of wind. I could verify this by looking down at the side of the hull. Marine growth clearly showed the waterline on the side of the hull, which I knew was about 6 inches deep at the rear of the boat. While planing you could see all 6 inches of the hull sitting on top of the water. Funny humming noises came from the rigging too. It was a hoot! My oversized daggerboard make it point like a monohull, and it tacks easily. The rudder is retractable, so the boat can float in about 8 inches of water. Handy for beaching and shallow bays and inlets. It holds a ton too with plenty of storage.
Some interesting technology that this boat uses includes a rotating mast, a wishbone boom similar to what's used on a Nonsuch sailboat, and slung seats made from truck tarp vinyl and pieces of carbon windsurfing booms.
After the retrofit in winter 2013-2014
Buest Guess newly constructed, plus some background on why I built this boat
Sail camping on Tivoli Island in Lake ozette
A nice, breezy day in October
Retrofit, winter 2012-2013 (read about the ama planes)