Continued finishing up the last tasks required before riveting on the top skin: 1. Tightened and torque-sealed three of the last five fuel connections on the fuel pump assembly. The last two connections will be made once the rudder pedal assembly is installed. 2. Marked the Skybolt plates, and marked their centerlines on the firewall, so I can position them again later. Removed the plates. 3. Deburred all holes on the firewall flange. 4, I began clecoing the skin on, but I discovered that when I bolted the back of the radio rack in place, I'd "locked" the instrument panel in a way that meant the top attach angle could not flex at all. This meant that the fit of the top skin became difficult because the aft row of attach holes didn't line up any more. After thinking about it for a while, I decided to un-bolt the radio rack from the Z-channel, and let it "float." My rationale is that the rack sits securely on the Z-channel, it can't move fore/aft more than about 1/16", nor can it move left-right at all. In theory, it could move up down about 1/8", but the rack is securely attached at it front end, and it's really not going to go anywhere, even under a negative 2G load. I lightly twisted some safety wire through the bolt holes and called it satisfactory. 5. Clecoed the left side of the skin onto the fuselage and checked the fit again. The panel floats perfectly. I shoved a folded-up moving blanket under the right side of the skin, giving me some room to work on the final electrical wiring connections. 6. Found that the four wires for the recently-mounted LED lights strips were slightly too thick to pass through the plastic hole grommet I'd previously installed on the panel, so I removed the grommet, drilled the hole to the next-larger grommet size, and re-installed a new grommet. 7. Labeled all the cockpit lighting wires, trimmed them, spliced a couple of them with longer leads, and prepped them for making the final connections to the lighting controller and ground leads..