I've had to add a couple millimeters to the height of the aft most bulkhead as there is only just enough space between the hull and the deck for the control servos.
To keep the flat deck profile, I have had to add decreasing heights to each bulkhead leading up to the bow.. A very time consuming process due to the method in which the bulkhead profiles have been created (from cuts in the solid hull), it was also very boring.
I spent a good part of yesterday trying to figure out exactly how to fix the superstructure to the hull bulkheads and deck, it needs to be strong but I would really like to get the hull fabricated and start some testing.
Something else which sprung to mind, was having some 'D' link type holes sticking up from the deck at four points so that carry handles can be attached with clips, this will also be very good for storing the boat up out of the way and strapping it down to the bike trailer which I intend to get for it.
I expect that I could add them to two of the bulkheads before and after the main superstructure and they would protrude form the deck, this then brough me on to the idea of having similar type fixings for the superstructure. I could put a good watertight connector on the deck undernear where the structure would sit and it could connect to the bus which (if you've been following the build) is a common control bus providing power and control to all systems with an unlimited potential for expension (well, 65,335 possible addresses).
I'm still unsure exactly how the deck will be secured, as it is 1800mm long it will need to be split up in to sections. This is not ideal, as sealent will be required at each join. Access panels are also something to consider, I was thinking that I should use the same type of system that seals the deck.