That's what I meant, yeah. Good point about the weight, I hadn't considered the lopsided nature of that. I was planning on using felt sliders, so far they have worked out well on the current one. They prevent scratches, but unlike wheels, the stand is firm on the ground.
Masonite is an interesting idea! I think with the cork backing, the masonite might be thick enough to still put screws in from the button up, and (because of cork) not have the screw heads drag across the floor and scratch it. I was kind of thinking about trimming down a plastic floor/chair mat, but the attachment points would be a problem I think. Not to mention that poly isn't too fun to work with.