Spent the whole day preparing and installing various items before I rivet the top skin, since these tasks would all be very difficult to perform after the fact. 1. Marked and cut the notch in the avionics access door that will allow the baggage door hinge channel to be mounted. I may have to trim a little bit more from the door later, but for now, it's pretty close. 2. Drilled the two attach holes in the angles that secure the back end of the avionics rack stack to the supporting Z-crossbar. Used #8 screws and nuts to fasten the rack. 3. I probably didn't need to do this, but I spent over an hour adding lacing cord and the occasional zip tie to the wiring behind the panel, just to clean it up as much as possible. 4. Prepped the six lighting grounds and power leads that I will need to connect and tie up once the top skin is set into position. I did not install the avionics fan or the small GPS antenna to the glareshield, because I'll be able to do those tasks much later, through the large EFIS hole in the panel. 5. Installed a headset hanger on the right gear tower cover. 6. Secured and tie-wrapped numerous wires inside the gear towers. Secured the L fuel tank vent line inside the left tower. 7. Attached the left and right gear tower covers. 8. Installed (but did not tighten) two hard fuel lines (one from the fuel filter to the fuel pump, and the other from the fuel selector to the fuel pump.) 9. Installed the red and white LED lighting strips on the underside of the glareshield. In addition to the adhesive strip on each one, I added a bead of clear E6000 adhesive to keep them in place permanently. Heat-shrinked the four power wires to keep them looking tidy. They will pass though a small hole on the right side of the instrument panel (already drilled and grommeted.) 10. Measured, cut, and installed the SCAT tube from the left NACA scoop to the air vent on the instrument panel.