Yeah for sure I'll do a paper schematic or rather CAD first. I've already started a spreadsheet of parts and pinouts which is the first step to a netlist. I play an electrical engineer at work and I've designed and led the build of complete electrical systems for several prototype vehicles. So doing it in CAD and then making the harnesses from that is natural for me.
My mechanical engineering skills are good but my mechanical CAD experience is very rusty, so it's easier for me to do that part with cardboard mockups.
