Printed without supports and widest face down. The built-in lock on the frame may need to be worked back and forth to break free depending on your printers tolerances.

Screw holes exist if you want to use screws to attach the cat door frame to your door. Alternatively, glue can be used (but can make future upgrades a bit harder to install).

If the built-in slide lock is unintentionally sliding when not desired, you may be able to add some tape on the track to increase its friction.  Please keep an eye on it to make sure that none of your pets are getting locked out.

Disclaimer: Results may vary. This model has not been tested for durability. Anyone installing this cat door should follow all safety precautions and ensure this model fits their individual use cases before installing.