The 84-074B roller looks perfect, but I can't figure out how to get the door out of its frame. The bottom roller adjusters are completely rusted and immovable (even after copious amounts of WD-40), the top rollers are as loose as I can get them, but there is still a good quarter-inch of door inside the frame when I lift it, and the door itself is up against the inside top of the frame. All the sites I've found say to "gently pry" the door out, but no matter how gentle I am that would break the fiberglass frame.
Not sure what I'm missing!
Thanks.