If you have a look at my website, you´ll see some photo´s of my havsfidra.
The cockpit floor does seem to only be about half a foot above the waterline, and the through hull
fitting is actually 1cm below the bootstrap. I think this is the main problem.
also currently i´m only at half load, i have full fuel
(only about 30litres) and no water, however the water tank is at the bow and therefore maybe fore and aft trim is part of the problem. however looking from the shore and at photo´s the trim seems fine.
I think the solution of raising the cockpit sole with a permanent raised flooring
is a good idea, also fitting one of the above mentioned in line valves would be useful.
The extra height could allow some extra stowage in the cabin
which is sorely needed!