I think I'm getting the hang of designing plastic parts that act like plastic.
The next step in the office organization project is an IKEA BESTÅ that is a smidge too low for the Roomba to get under. So I made a foot for its legs. It snaps on, stays on, and snaps off.
The square cutout on the bottom is for a nonslip rubber pad. The six small holes are to create columns of perimeter to stiffen the load bearing area.