Ferret Nation question

I plan on using a double FN cage for my future two chinchillas. For my main edits to the cage, I'll be removing the floor to the first level and replacing it with a metal pan with tile inside, removing the first floor shelf, removing the second level floor, and keeping the second floor shelf and putting a fleece liner on/around it. I will also be adding multiple wooden ledges. One 10 x 6 inch, one 16 x 8 inch, four 4.5 x 6 inch, and four 2.5 x 6 inch. So ten ledges in total. Most of them will be in a stair-like formation, leading up to other ledges/items. However, will the second level floor not being there be a safety hazard?