1 hr, 4 rivets
Cut and drill angle brackets to SL-40 shims.
In this picture, the panel is to the left, and the center rib is at the top. The view is the left side of the rib and radio stack assembly. The angles near the center will brace the SL-40 tray solidly to the subpanel, and this will lock the whole stack and the instrument panel in place. I'll use a bolt (maybe even a cleco!) to tie the two angles together, so I can remove the tray and the panel.
Bought a Skyview display from Stein. It arrived today. Now I have all the avionics needed for VFR flight. About the only big things I still must have for first flight are seats and camlocks for the cowling, an oil cooler and FWF hoses.