Thanks for all the input guys!
...As for the 40 amp grounds, thanks for pointing that out. I couldn't find a written rule requiring the return to the DIN blocks so I've held off in changing it. I'll fix it tonight though if you all think it will be a problem. (good to do the little work now rather than before a match in Manchester.)
As for being jumbled, it admittedly is.
Last night I installed shrink tubing labels to all of the crimp connectors on the fuse block end, and all of the control cables have been labeled from the start. This in addition to component-side labels and good bookkeeping is all I can really do. I only have so much space to work with and a good number of wires to fit in, so some sacrifices have to be made. So it goes.
