This session was the first time in a long time that I feel like I've accomplished a lot during a work session. I went to a local metal distributor and bought a piece of aluminum large enough for the left rear boot cowl piece. I cut it to size, then drilled and fit it to the airframe. All the rear pieces are now fitted, cleaned up, and ready for priming. Next, I did a little bit of clean-up on the firewall. I then mounted the engine back on the firewall and got it bolted down. The airplane is now ready to start fitting the new main cowl pieces. Should be fun.