When I got my machine, I moved the plumbing a bit to ensure no contact with the case.
Also secured a couple of errant bits of the wiring loom where the connectors could rattle against the metal work.
I added two strips of rubber under the drip tray and a cut down sink mat to the top.
A slight upward bend, ~1mm, to the drip tray cover prevents it from rattling against the bottom of the valve drain.
Noise level is < 60db @ 1m, C weighting. Several people have asked if it's a rotary

It's quieter than any similar machine I've used.