This weekend's big accomplishment was getting the remainder of the major electrical components mounted on the firewall:
Down by the starter contactor, I installed bases for ANL current limiters. One is where the main alternator B-lead will attach, and the other will feed the main electrical bus through the firewall. They both take power from the upstream side of the starter contactor via copper bus bars. I'll insulate this area with rubber terminal boots when I bolt down the fuses.
This 6-position fuseblock comprises my always-hot battery bus. It will be fed by a short 10 AWG wire directly from the hot side of the master contactor, and will power things like the hourmeter, the electronic ignition, and so forth. Just above the fuseblock is the relay that energizes the E-bus. By the way, these are all automotive-grade components, so I don't have any qualms about mounting them on the hot side of the firewall.
Above the E-bus relay are two holders for Littelfuse Midi fuses, with I think are the same as a Bussman AMI fuse. These do the same job as their cousins down below, they're just smaller… one will connect to the standby alternator B-lead, and the other will feed the E-bus through the firewall. Since they are OEM automotive components these fuse blocks have 5mm studs, which may end up being the only metric hardware on the whole airplane.
All this stuff is attached to the firewall with nutplates – lots of nutplates. I fabricated a whole series of doublers to mount everything, which is what consumed the majority of my building effort this weekend. Then Mary, who is awesome, took time off from studying to help me rivet them to the firewall, even though she has exams this week, because that's how awesome she is.
Seriously, did I mention she is awesome?