UPSTAA front foot

The problem: scratches on my desk.
Cause: UPSTAA's feet leave traces after sliding.
Cause: the provided sticky rubber feet kept sliding off the main panel.
Why: the combination of the angle at which the rubbers are attached and the total weight.

Solution: a foot piece that enables you to stick the rubber to its flat bottom.
Furthermore:
- slides quite easily into place
- once in place there's no room for wiggling
- after removing no marks on panel