vibration damping printer feet (flex)

After using this a while it tended to topple over. I made an [other, completely different one what is also for flexible filament and hast also flexible strongness in (Slicer perimeters)](https://www.prusaprinters.org/de/prints/18196-anti-vibration-feet-flex-for-i3-mk3s)

story why I build damper for one of the most silent printers:
The Prusa i3 MK3 is pretty silent but my nighborhood sometimes is even more silent and gets disturbed if they can hear _any_thing. While infilling narrow parts the printer produced a certain oscillation what cause complain and I wondered if a more flexible base could damp it. --- It does! I'm not sure how much but to my surprice the neighbor didn't complain since I installed since I build that - however, since i showed him my processes it can also be that he's impressed by my research process (I kept him updated) and just ignores now what ever he heared before.. 'not sure.

TL;DR
This feet can damp certain vibrations of the printer (e.g. while small, l