Do you have on the bottom any supports, or everything standing on the side panels?
How high is bottom part from floor?
Is kickplate and backpanel standing on the floor or on the bottom?
1. I don't have any bottom supports, just wheels on the bottom. But I would recommend any enhancement you can make to make it more rugged and increase the stability.
2. That depends on how much you want to hide the wheels or if you have any wheels
3. They are standing a little bit over the floor, because of the wheels. I looks nicer if you cant see the buttom panel.
Good luck