Great link, Ray... having crawled around, and through a friend's P40 I can attest to much of what the last poster pointed out. (note, though, that the post is dated 2001 - so anyone reading it today should keep that in mind)
Good tech data for the OP, essentially from a builder!
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)