Anti-vibration squash ball feet designed for Creality Ender 3, but can fit any printer with 4040 aluminium profiles.

"Squash_antivibration_4040_Rendcap" and "Squash_antivibration_4040_Lendcap" are mounted as endcaps for the 4040 extrusion and are secured in place by one M5x10+ bolt each. 

"Squash_antivibration_4020" parts are mounted to the sides of the aluminium extrusion. Attaching them is a bit tricky, first you have to insert the M5 tnut into the profile and then place the printed part over the tnut (its best to do it with the printer upside down, so that the tnut doesn't move around). Alternatively, you can slide it into place from the front or the back side of the extrusion.