Ender 3 4040 Slide in Foam Golf Ball Foot Damper

Made this for my Ender 3 but you can slide this foot into any 4040 extrusions.

I modeled this in tinkercad and screwed with the tolerances because, at the time, my printer wasn't terribly accurate dimensionally.

Here's the tinkercad link if you want to mess with it.
https://www.tinkercad.com/things/6lZiTA2JdbQ

Print one and see if it fits before printing 4 of them.

This uses foam practice golf balls. You can get them much cheaper than squash balls and they come in a bag so you can