Well done! It's the first Cat box with scientific engineering
Magnificent creation!! I wondered why you put the trough in-between the two entry/exit holes, but then realized it's better to have their bedding-area as far away from the holes as possible (plus, they have more room to collectively rest/sleep in the most spacious part of the condo). Boy, they are gonna love these digs in the winter (uh, it's still winter, isn't it...it's hard to tell here in Vegas).
KW: I don't know how much science was involved, it felt more like a guy with a saw & a screw-gun, just winging it.Erik: It is less winter this week than last. The WIND here is ferocious, so, when it is 40 degrees it feels like 25, the way it cuts through you. Eventually, when my trailer gets moved, the cat-condo will sit lower to the ground, which will protect them even more.