"Our boat was built in a similar way to the Gougeon boat shown, with lots of thin bracing and trusswork. The plans don't show this but it is relatively easy to work out for yourself (to replace the re-inforcing shown). "

John, if you have any photos/ sketches of how the cross-bracing works and what you fix it to on the hull sides I`d be interested in seeing that - The SA Mosquito`s are built a bit heavier than the Auzzie boats because we don`t get the lightest plywood sheets here, have to make do with what gets imported. If we can save a bit of weight on the internals I`d be keen to investigate further.
How much weight do you think that building method saved from the conventional method on the T ?
Most of our internal bulkhead are polystyrene except for the beam bulkheads, bridle bulkhead and daggerboard case stiffener, so not sure if we can save that much weight. Would only be worth building new hulls if I KNEW I could get 4kg per hull lighter. Not likely when they weigh about 21kg each though, although the Auzzies build them to 18kg or thereabouts, so could be possible ?