Yes, I have a diagram!
The small numbered boxes along the edge are the 50ish wires that exist in the car chassis, that need to be tied into. I will probably just use marine heat shrink butt connectors, but I might add a few multi-pin snap connectors in the make the assembly removable. It seems like being able to disconnect the entire fuse/relay panel at once and diagnose things on the workbench would be really nice...
Oh, the mockup above, it's being made in 1:1 scale, so once I get everything happily run, it will transfer right over to a proper backing plate, which will be what goes in the car. Everything fits within a 6.5x21 inch panel.
Oh, I will have one spare fuse in each fuse panel for expansion, as well as the spare relay. Finally, the busbar has big 1/4 studs on the corners, which makes for easy locations to clip leads on the either pos or neg as needed, or to power something like a timing light.
Comments? Criticism? Suggestions?