As I continued to update my PPT wiring diagram, I started realizing I had left some items out of the panel, so I updated the placement and numbers of breakers & switches on the front of the panel.
As an example, I previously had the EFIS & EIS coming off the same breaker. I really think I want to have a separate breaker for each; that way, I can still have the EIS running if the EFIS develops a problem, and will still have all the engine information on that device.
Similarly, I decided to change some breaker-only items to switched breakers to have greater control and ability to isolate panel items.