I wanted to quiet down my Kossel Mini with some feet, and wanted to do something smaller than a squash ball or tennis ball. These little bouncy balls can be bought at the gumball-style machines at many grocery stores for $0.25 each.
I remixed the 2020 version of the End Caps for V-Slot thing, and attached it to a cupped cylinder I made in TinkerCAD. I needed to trim the extrusion slotting for my 2020 because the aluminum brackets I built with have a small tab in the extrusion that blocks a small portion of the slot.
I might edit it later and make the cup a bit better fitting, but it is working for me at the moment, so I might just leave it alone.
Update #1: I am really surprised at how much quieter my printer is now that it is not resonating all of the sound through the table. I also just fixed my typo in the title...
Whatever I had PLA
Infill may need increased if you have a larger or heavier printer.
I didn't bother with support, and you can see it in the cup, but it doesn't seem to affect it's functionality as of yet.
You may want rafts if you use ABS or have trouble with peeling prints. My bed sticks pretty well, but there isn't much contact surface for the part to print.
I had to clean up the lip edge on the cupped side because my first layer is a bit wide, and it was actually cutting into the bouncy ball.