New version - a more substantial clip and with improved springiness!
Print five. One for each corner, and one for the centre for improved weight distribution.
My own version of shock absorbing feet for the Ender3 - I needed something low profile due to where my printer is located. Should work with any printer made from the same types of extrusions as the Ender 3.
I find them quite effective in cutting down on the vibrations.
drop the flow rate to increase the springiness
The top and bottom horizontal sections probably won't print cleanly - that's not a problem really.
V1 still in the files section if anyone wants it. It still works, but with the looseness of the clips cuts down on the usefulness. Despite being more substantial V2 is actually springier.