Time consuming day today. Managed to get the 4 fuse blocks mounted in the vehicle and run the pos/neg cables for the deep cycle side of things. Tomorrow is the ign source cables - this is going to be a struggle as there are more cables and I think quite a few will require extending. Also have 3 cables that I somehow didn't label and one joined with a crimp connection came apart and I can't locate the other end - always happens. 7 hrs is about the limit for me screwed up like a wet towel, so will see how it lands tomorrow, but it looks a hell of a lot better.