After reading my previous posts, I see that my language is not the best, and my questions are vague and open for interpretation. I'll try to put it straight:
The hull is one separate part, and the deck is another. The deck is designed so that it will fit over the hull, the deck resting over it with about half a cm sticking out all around the hull, and there is also a downward-facing edge on the deck, about half a cm.
I'm trying to think of a method to fix the whole deck to the hull. In order to do this, I have drilled four holes in the deck, and fitted four nuts to the hull, corresponding to the holes in the deck. Thus, I can fit four screws which will hold the deck in place.
As can be seen in the video and pictures in the previous posts, the boat makes a rather large bow spray, higher than the hull. When the deck is fitted, the bow sprays will reach up to the deck, but because of the edge on the deck, the bow spray will be directed to the inside of the hull, where it of course is not supposed to be. I have tried to fit a K-profile weather strip to the deck in the hope that it would make the connection watertight, but it did not work as intended, and the hull was filled with a litre of water after only a short time on the water.
The question is: how am I going to make the 'connetion' between the deck and the hull watertight? Any suggestions?