duster rear window rubber wavy inside

now see... this might be a good reason to install the glass at top first like the manual says, especially when doing rope tricks. I can imagine the rope pulling any slack available to the finish line. The bottom line of the gasket is much more ridged. I personally do install glass from bottom up like most everyone else, but then I don't use a rope. My gasket is placed and pretty well adhered to the body before the glass goes in it.