Here’s a close up look at how the beam has a snug fit into its sleeve, and the sleeve goes in thru the deck of the float hull. All those gaps will get filled in with high density epoxy ‘putty’.

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Last night the sleeves were bonded in to the float hull. Each bulkhead (one seen below) has a large notch cut so the sleeve straddles it, and gets glued and glassed from both sides. Spending an hour or so inside the float this week reminds me just how big these caverns are; they would easily fit bunks and bikes and way too much accumulated treasure on long journeys!
These steps are going quickly, so the beam fairing structures should get mocked up by the weekend.