I had designed some anti-vibration feet for the Geeetech i3 printers before, but these slowly started to sag and compress over time.
For the people that has these problems and for those that just want the better design right away I now have V2 which has a reinforcement bracket in the feet that give it extra strength but still makes sure these is almost no noise from the printer.
Still work best when combined with the Astrosyn Nema17 decouplers.
Print everything once, except for the front part, those are indicated with "Anti-Vibration Feet - Damper/Feet - FrontLR.stl".
These need to printed 2 times each, as the front parts are identical and are just "mounted" the other way around.
Use M4x6mm nuts and bolts to fasten the feet together with the dampener.
Then just slide the part under the correct corners and you're ready to enjoy your audible difference in printer noise.