Seems you have a lot more systems than I do Oz, Lots of spaghetti in there. My system is fairly simple, only two lighting
circuits and a electronic suite. I have 3x2 leads running aft from the panel, one is the stern light, one is the electronic suite, and the other is the stbd cabin
light. The electronic suite has a small set of bus bars soe individual items can take power. They are all inline fused as well.
There are 5 leads running forward, two grounds, nav lights and house lights and 3 lighting
circuits. Two are for the masthead light/ side navigation
lights and spreader lights, the third is the port cabin
lights and then the stbd forward cabin light and head
I put my individual photos on photobucket, and then as I write, I just cut and paste the image code then move down a couple of lines for the next description.
As for the cabin work, repairing the rotted base sections, I have a lot of people at the club telling me I should just bite the bullet, put the boat in a shop for the winter and rip the coach roof off altogether and make one up out of steel
. From the point of view of strength and leak proof design it makes a lot of sense. But then I'd loose the mahogany both inside and outside which really makes the boat come alive for me. Every once in a while I wonder about the effects of a large breaking wave against the side of the coach but I think perhaps installing vertical posts inside the cabin against the sides that are welded to the coaming at the side deck
and run from the ceiling overhead beams down to the hull
stringers would add a hell of a lot of side resistance. If done properly they'd hardly be noticeable.