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Kankama said..
I am in two minds about Leo. I love watching his chisel skills, I have never been able to get joints like his but then again, I don't have to, I use epoxy glue. I have real trouble seeing the amount of work and rare tree species that go into making a boat that could have been launched by now if he had used a more modern method - like cedar strip composite. The skills are incredible, but the sheer waste of endangered woods, or the casting of bronze hardware when we would do the same with glass today in hours has me shaking my head - what is the real point of it all? The boat will be no better than one we could build from scratch in simpler and stronger methods. But the video would not be as interesting.
Knowing two boats that took decades to build (I built the shell of one of them) and neither owner saw launched (one suicided and the other died naturally), I would also like anyone thinking of emulating Leo to remember that sometimes getting into a big project can be the biggest mistake you can make in your life. Certainly the guy I built the shell for went through hell in the end over the project.
I have built 4 boats in my life and only one is a singularly happy experience. Be careful of dreams, make them simple and achievable, or they can turn into an ordeal. I worry about the people emulating Leo who don't get the help and money he does - who get stranded with half a boat and no way of finishing it. Go small, simple and get it done - rough is fine, just finish it and get sailing. Another problem with perfection is using the boat. You have to be able to leave it on anchor and walk away to the other side of the island. You have to know that you can lose your boat because it may happen. So going so deep down the money and time road for something you want to use as a cruiser doesn't sit right. A guy I knew built a wonderful trimaran - it took him 15 years to finish it. Then he capsized it and lost it. You gotta build it knowing you may lose it all one day.
Regarding the timbers
I was involved (Partner) in a business from 2009 to 2015 importing similar timbers to the ones Leo is using, dense tropical rainforest timber from the Amazon. Leo mentioned he sourced his from Suriname, the timber I imported was from Peru but essentially all Amazon Timbers. Like Leo the timbers we imported were Forest Stewardship Council certified (FSC). In order to carry that certification you can be sure the timbers are not endangered, there is a UN list of endangered species and anything on it cannot carry FSC certification so Leo is not using endangered species in fact FSC certification is regarded as the best environmental standard. Our own industry and government created the AFS standard here in Australia as the FSC standard was to rigourous, especially in regard to respecting 'Traditional owners" of forests. There are many others aspects to the standard but essentially it is selective logging, no clear felling, a logged area must remain an intact forest after the timber is harvested, only species and individually approved trees (gps recorded) in a survey the year before can be taken. Its a robust standard, not perfect but certainly the best available.
Regarding the Construction
My own boat is timber, but the modern cold molded compsite method you mentioned which I agree is a better method, however I do think something built from durable products in such a way as to last a very long time (100+ years) is environmentally friendly. Recently in the windsurfing world there has been some "eco" friendly boards being built using bamboo etc that are having issues after 1 or 2 seasons and being scrapped. I think a much more robust product with a long life span will prove more sustainable in the long run even if the initial construction has a greater environmental impact.
Regarding Dreams of Building/Restoring a boat
Agree 100%, look in the interesting boats for sale thread, I posted a pic of my own similar experience to what you mention.