3UP Vibration Damping Feet

These are vibration damping feet for the 3UP printer http://www.thingiverse.com/thing:354802 which was designed by DDeGonge888.
I redisigned these ones https://www.thingiverse.com/thing:94279 to fit the 20 x 20 mm aluminium extrusions, so they should fit on any printer which uses these extrusions.
I did put anti slip pads under the feet, so the movement is actually absorbed by the damping feet.
The damping feet reduced the noise of my 3UP a lot.
I printed them at a layer height of 0.25 mm and 20% infill.