This went out to the biochar forum but I think it belongs in the rocket stove forum. I trust the moderators will not see this as spam - because I never do that - ever.
I think we have just built the largest rocket oven to date??! From the drawing board to a working prototype in just a few weeks and still going strong 2 months later. Thank you permies.com Also see our very first thread whist we were still conceptualising it. https://permies.com/t/85181/Rocket-stove-dryer-oven