Hi Marc,
I'm following your story here, thanks for posting.
Getting a bit confused....looks like you're building a sub hahaha, making it watertight that much. If you continue to make it that watertight you could create a nice act with it, sinking the boat in a controlled way and let others perform a search and rescue operation.
Now being serious, nice model you're making, thumbs up!
Best regards,
Léon van der Horst
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