I am about to bite the bullet and replace the plastic on my 6A slider canopy. I have repaired a large crack in the top center twice and last winter it cracked a third time. I bought the replacement canopy over a year ago so now it's really going to happen. July is here and it is surely warm enough to make it work well. I am considering not putting the center strip back on top and not riveting the plexi to the top rail. I have seen some done this way and liked the simplicity of it plus that is where my crack began. Any input from those with experience would be appreciated. Thanks in advance Randy