How do people secure the coroplast on the upper level if there are no sides?
Like this one...
https://www.guineapigcages.com/gallery/117/
Also what would the measurements be if i didn't have any sides to it for a 3x1 upper level?
Like this one...
https://www.guineapigcages.com/gallery/117/
Also what would the measurements be if i didn't have any sides to it for a 3x1 upper level?