@frikigeekfran Yes! I had the kittens already trained to use it in a different location. And as I'd hoped, the catio door was exactly the right soze opening to just add it.I can't take credit for the nice design, I Iterally just followed the instructioms rigt up to the part whre they said “put the two cubes together” and just made a second roof out of plywood leftover from a different project.Because everyone always has leftover lumber lying around, right?