Boy, what a great day! No phone calls, no visitors! Do I sound like a real hermit or what?
Reinstalled the center and right instrument panel sections. Used the good brass colored screws. Looks good. Have to order more for the top.
Built up the GPS mount and installed it. Did not drill the unlatch hole or enlarge the opening - I will live with the semi-permanent installation for now. Installed the internal battery, wired and installed the GPS.
Installed the intercom. Stayed with the defaults on the DIP switches. Knocked one of the little mounting studs off, had to disassemble the box and superglue the stud back in place. No problem.
Tidied up a lot of the wiring with cable ties.
Mounted the ELT antenna and bracket. Real tricky getting the three nutplates inside the brace. Installed the buzzer. What the heck is that for, anyway? Installed the ELT back plate and wiring. Installed the ELT itself. Unpacked and started looking at the remote ELT switch, the last piece.