Thanks for the video - very helpful. Our Vista Roof barley moved without being helped the last 10" or so. Cleaned the tracks using your video as a guide, and then chose to use the PTFE Lube (XG-8 ESB-M1C111) for the s-curve tracks at the front and the Silicone Spray Lube (XL-6 ESR-M13P4-A) on the aluminum tracks. Now it closes in half the time and does not noticeably slow near the full close position. Now to see how long it lasts!