Arrived with the door in the opening off center with small cracks on each side as the door was slightly twisted in the opening. Bad final control. After about 10 minutes, using a Phillips screwdriver, the door fell into the opening evenly and without gaps. Simple, but that's the way it had to be. My next problem was that my window was between the available factory widths. Emailing the seller resolved the issue when I was ready to downsize with the next larger size. I removed the two end pieces and put them through a table saw and the problem was solved. Easy window installation, I spent $3 at Home Depot to caulk the bottom of the window and the top of the door structure. One of our Bengal cats went the right way. through, but the other was not satisfied with the door. As others have reported here, I taped the valve off for a day and then told my cat to make up her own mind about going to Catio. Great door, a few issues didn't bother me as this door is perfect for my cats. Oh and my scared cat made it and uses the door with no problem. EDIT: Some complaints about the door lid being too hard to control, here's how to control the lid: hold one side, push toward the opening, then push on the door. center of the domed cover and remove the other side. It may take a few tries to learn, but the lid comes off easily.
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