My MK3 printer stands on a Ikea Lack table which is an excellent amplifier for the vibrations of the printer. So I designed these feets like the Prusa original feets for the MK2, which did a good job, without making the printer too wobbly.
Additionally a version with low profile is available.
I recommend 3 Shells, no infill, no top layers, no bottom layers. Use PETG oer ABS.