1. Began planning and laying out the installation of the avionics cooling fan, otherwise known as my windshield defogger. :-) I match-drilled a long strip of aluminum to the top skin, then clecoed the strip to three bulkheads -- the instrument panel, the firewall, and the bulkhead between them. This established their relative positions when the skin is finally riveted on. Then I took some measurements behind the panel and determined the best place to mount the fan on the glareshield. It looks like the edge of the fan should be 1" forward of the row of rivets that attaches the top of the panel. So I marked the top skin appropriately, found the centerline, marked where the fan will go, marked and centerpunched a hole, measured the fan opening, and used a compass to scribe a circle around the hole in the skin. This will be what I cut out for the fan opening. There are also four screw holes I'll drill later. I also pulled off the protective blue plastic from the top skin.
2. Earlier in the day, I drove my prop governor to Aircraft Propeller Service in Lake Zurich, IL for a mini-overhaul, and to have its output adjusted down to 330 PSI for my Whirlwind prop. [Not counted in build time.]