Now, I have pictures! First shot is picture looking up liner from inside. It's ovalized, and I see a few crimps which appear to be where bolts were put into the liner but didn't actually penetrate the flex part, instead warping. I also circled the air leaks, you can't see them all because the camera wouldn't go wide angle enough. Another is I put a flashlight inside and shined it up the liner, shut off all the lights, and wanted to see if the liner passed the light leak test. There was A LOT of light leaking out. There were no lights on, so what you see is what escaped the liner. The other, shows the device that seems to cause the leaks. Anyone know what that is? The back of the installation is very tight. Everytime they screwed the liner into it, and pushed the insert backwards into place, the liner would hit the back wall and pop out of the insert. After 3-4 attemps he got that thing and looks to have tried to install it as a 30 though, it certainly isn't a 30. It also doesn't even look like it's attached does it? He also kept screaming if only the flex were a few more inches longer. My flue is 7x11. So, is my liner too crimped/ovalized? What is that part that's above my insert that my flex is going into with all the leaks? What's the correct piece to fix the leaks and make it work? Thanks.