First I want to say I love your site! We used it a lot for inspiration when building our own cat-ladder. This one we build last spring. It took a while for my cat to get the hang of it, (it’s probably the 3rd version) but now he’s using it all the time.
He can climb up and down the fence by himself and uses the ladder to get to my balcony.
Met vriendelijke groet, Elise G, Amsterdam, The Netherlands.