Haven't gotten there yet, but my plan is to do as much as possible before covering the fuselage. To your list I'd add (if applicable) Aluminum angles/channels for routing plumbing and electrical up through the center console, ADAHRS, magnetometer (if required and not in your wing), pitot/static plumbing, transponder/ads-b antennae, autopilot servos, fuel header tank, and headset plugs if you plan to put them behind the seats instead of in the panel. I'm hoping others add more, because I'm sure I'm forgetting something.