I’ve always tried to keep 3d printer movement and vibration to a minimum. I have my P1S on a HON metal desk. To keep it from acting like a megaphone, I put a harbor freight foam anti fatigue mat under it. Is this a good idea, or will it affect print quality?
I have the same sort of mat, I saw no difference in print quality.
There are some fun videos on YouTube where printers are suspended on cables and still are capable of printing
My X1C came with rubber feet. It sits on an old wood dresser that weights more than I do. And that sits on carpet. After running the shake tuning, I don’t see or hear any vibrations. I usually print at .2mm layer height and mostly default speeds. I fall asleep if I don’t go do something else during a print. 
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Look for “HULA” by ThruTheFrame on Makerworld. Works great on my X1 to keep vibrations from the furniture.
Since the springs are not actually tuned though, I recommend lowering the TPU feet pads below the print plate in the slicer before printing though. Just keep two layers worth to provide an anti-skid function but eliminate the z-springiness.
As thrutheframe says; " I draw inspiration from seismic base isolators used to earthquake-proof building structures…"
Nice inspiration but the facts are twisted. The buildings aren’t moving, the ground is in seismic events. The reverse is not a valid assumption or true. A printer will still move if resting on a bearing. It in itself is the seismic event. And I’m pretty sure it will negate an X-Y tunning. But it MAY keep a table from shaking, however, I doubt it. It doesn’t have enough movement suppression.
The printer can be used as is, but I use the Rubberific 16-in L x 16-in W x 0.75-in H Square Rubber Paver, which can be found at Lowes or Home Depot.
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