I still wasn't happy with the cage so I did some remodeling. I expanded the kitchen to 2x2, put higher walls and reduced the 2nd level to 1x3. This opened the bottom level up and gave it more light - and made it more accessible.
Just Coro covered with fleece. See this pic for a close up and more details on how I built it. I need to build another one to cover with my new fleece. It is just attached with zip ties so replacing it will be easy.
https://www.guineapigcages.com/photos/showphoto.php/photo/6761/cat/500/ppuser/6189
I love your cage. It's a great design. How do you clean the ramps when you switch them out? Do you slide out the coroplast out of the fleece and then slide back in after it is washed?
So far all I have done is sweep the ramp. They don't use the bathroom on it so I haven't actually washed it, but when I change to the new fleece I will probably just wash it by hand in the sink so I don't have to untape the whole thing. When I switch to the new fleece, I will just build a second ramp covered in the new stuff.