jubrand wrote:....how do you get the flat plate on the bottom off? ... I don't see anymore screws.
Find four each, 10mm dia, x 0.5mm thick, foot-pads on that bottom plate. Under each pad you will find a screw that needs to be removed.
The foot-pads may be self-adhering and can be peeled off like sticky-tape, or they may be spot-bonded in place with RTV-silicone adhesive. I have forgotten which it is, but do see silicone-elastomer residue on the sample at hand.
For sticky-tape like adhesive
Hint-1: A little heat applied with a hot-air gun will help release the adhesive, allowing easy removal of the pads.
Hint-2: Prepare yourself with a safe surface on which to temporarily store the removed pads. I use either waxed-paper, or the backing sheet on which postage stamps are kept.
For silicone-adhesive bonding, you will just have to knife under the pads to get them off; and, re-apply adhesive when replacing them.