Update. The panels I made have made a significant difference. Here in the lovely North Texas weather, close to 100 days over 100, you can actually back the fan down a notch once you get cooled off. If you touch the hard portions of the top, it is much hotter than the panels.
One thing. While easy to do, I highly recommend using the adhesive from Thermotec. I tried several others, and none of them worked like their product. At some point I will redo the back section as it became a bit twisted when the 3M 77 failed to keep the panel up.
Any more questions, please let me know. This is a great project.