Howdy Lee! I'm ready to chop the 18 into 3rds, but I'm leaning towards waiting on installation of the extra bulkheads til after she's apart. I'll leave the existing bulkheads in the cockpit section, then use that as a template to mark out the new bulkheads for the compartments. (Basically, I'll just trace around it, reduce it by the thickness of the wood and glass, then glue it in). 6mm, you think? Then glass the outside, of course. I'm thinking just regular stainless machine bolts with fat fender washers and some kind of gasket. I can wrench-tighten them, no problem. What are your thoughts? Also, any good online sources for some custom duffles for the sections?