Thank you for sharing the stories of your adventures on the water and in boat building. My family and I have been enjoying the videos.

At present, we are refitting a cold-molded aero-rig sailboat named Fly that was built in the UK by the Elephant Boatyard in 1991. The yard was one of the early adopters of West System construction with red cedar strip planking for larger sailboats. The hull construction of this boat and rig has some ideas you might consider for your build. The hull layup on Fly is similar to what you are proposing: red cedar strip planking edge glued with West System epoxy and then several layups of vacuum bagged fiberglass inside and out.

Here is the first suggestion: on the interior, the hull is covered with two layers of nylon ballistic cloth which is glued in place in such a fashion that it can release. The idea is that an impact, especially with a sharp object (e.g., corner of a shipping container) might penetrate the fiberglass layers, but the cloth will release and prevent water ingress. This is similar to the construction of Greenland kayaks and Aleut baidarkas. What is more, the nylon cloth gives the interior a very nice finish. See the photos of the aft-quarter berth on Fly: https://www.mcyachts.co.uk/news/new-listing-70-ian-howlett-elephant-boatyard-aerorig-fly/

Here is the second suggestion: the Appendix for Gudgeon Brothers on Boat Construction gives data and several charts for fatigue that are quite revealing (pp. 379 ff). Consider the differences of wood and epoxy, fiberglass composite, and carbon composite. Wood composite performs considerably better than fiberglass alone due to cycles of flexing. One round the world trip may fatigue fiberglass to only 20% its original strength, whereas the wood will retain about 55%. The Gudgeon brothers point out that this loss of strength will continue with additional use. Carbon, on the other hand, will retain about 60% of its strength in the direction of the fibers indefinitely. As such, you might consider adding some layers of woven carbon along with the fiberglass. Proof of the long life of a carbon layup can be found in the freestanding carbon masts made by Carbospars (as on Fly) and Magma structures (on boats such as Black Pearl). If you intend to cruise in the higher latitudes, then you might consider some exterior layers of carbon woven with aramid fibers.

Best,

Jeff