My cats rule! My walls are not crooked. Ha. I built this chair rail for Willow. He likes to jump to the counter ledge. He can do it in one standing leap. He’s better than any human high jumper I ever saw. The only downside is that Willow likes to use his hind claws to assist. That has left a horizontal dirt mark on the wall. I could wash or repaint. But I figured that the rail would give him an assist and we all go away winners. Yes, I know it doesn’t quite match and there are no chairs here. But look, I attached it without any hardware (screws) showing. After I put it up, Willow hasn’t jumped to the ledge again.