As far as binding goes, mine bound up because the new divider bar channel was balling up in the track. When I scraped it out the base material was like putty and hadn't set. I tried Velcro fuzzy in the channel and it worked for a while. Now I have no fuzzy in the channel below the track when the window is all the way up. Works easily and does not rattle when it's down, so I'm happy.
