I bought my Northern CA house intending to build a cat superhighway for my 4 cats using it's architectural ledges. I have been planning to add many of the same features inside as well as a catio outside, but I haven't seen anything that is this well designed and built!!! How much of the cat customization was designed this way and how much was figured out during the build? I assume the wall openings/tunnels and the litter closet were all designed, but how about the corkscrew, bridges, shelves, etc? Was there a lot of trial and error for your contractor to marry form and function? The end result is extraordinary, beautiful, and fun. I am glad none of my cats are perched on my keyboard as usual today...I'm afraid they'd try to find you and move in....Bravo for creating my vision on steroids!! I have a couple more questions if that's ok...Are there designers/builders/contractors that do this a lot? I need to find someone to help me with creating a catio/screened in lanai type thing on my back patio....should I use a landscape designer, carpenter, architect...NO KITS! If all of this is too much to ask, I understand...sorry to bother you. I'm in Tracy, California.