I noticed the loudest thing of my BIBO2 Touch being the y axis stepper being directly mounted to the acrylic case and therefore transferring lots of vibrations to the case. So I got myself a pack of NEMA17 dampers ( https://www.amazon.de/dp/B015Q294ZS ) and designed a mount to replace the rods that hold the y axis stepper motor.

I printed the part with 100% infill and designed it to require no supports. Please file the inside properly to not damage your belt.

Print with 3 shells on a 0.4mm nozzle to save your printer some stress :-)