Holes in the floor under the plates, and even if they're not, can be welded, ground up and made invisible. I cut a pie shaped area on two sides, fold it down, and when finished on top, fold it back up against the plate, weld and grind it. Dust it with primer. Can't tell it was done.

25.x cages with a lot of bars and a funny car cage? Just take the roof off.

If the results don't match the theory, change the theory.