I built my trailer from CAD plans I bought from Greg Scace.The plans were wone of my best investments.
The boat has held up to heavy use in San Francisco Bay conditions. I pulled out one chainplate due to operator error but have had no other structural problems with the boat.
The platform is not as stiff as the Marstroms primarily because of the small cross section beams, but given the choice I would rather upgrade the boat with Marstrom foils rather than fat beams.
The hulls have been holed and repaired a couple of times and the platform is still within 2kg of minimum weight. I have only seen one Gougeon/Houlton/Walker boat that needed correctors. Building to minimum weight in wood is difficult.
The beams seats are epoxy/micro balloons and do wear. I redid the beam seats 4 years ago and have not taken the boat apart since then.

The cold molded Tornado has outlived all the glass cats I have owned. I think the strip plank F-16's are worth the extra time and effort in construction.