Generic 3D Printer Sound and Vibration absorption

The printer is mounted to a baseboard to improve frame geometry, allow for easier movement (less need to realign everything after moving the printer due to distortion, and frame torsion), and reduce (not eliminate) bed levelling requirements.

I started with this:
https://www.thingiverse.com/thing:512213


The base board and printer is then placed upon a partially inflated mountain-bike inner tube.
The tube is inflated to a pressure dependant on the level of stiffness required in the shoc