Yes I know, I'm into mock-ups. If the boat was a cardboard project it would be finished by now. My love affair with mock-ups comes from a long experience with ships/boats where you find yourself asking "how the hell did they put that there?". I worked on one power boat where the hydraulic header tank could only be filled by a size zero supermodel (and I could never find one prepared to fill hydraulic fluid).
So now I use mock-ups. Its saves a lot of cursing.