After looking at the canopy clamped to its frame, I decided to trim another 1/8" to 1/4" off the bottom edge of the canopy. It just seemed like it was hanging slightly too far over the frame, for no good reason. I marked the new cut line with electrical tape. My friend Jim helped me remove it and place it upside down on the work stands, then I taped it down and started trimming, using a 60-grit belt on a 1/2" belt-sander, then two progressive passes with the sanding board (80-grit and 120-grit).

I also smoothed out the notches again, then ran the plexi-scraper along the edge to deburr it.

Tomorrow I will sand the edges down to 1000-grit again.