Yes, they do and they don’t compress like the felt ones, I know what you mean about that. I think DC put me onto these a long time ago and I also use 20mm under the Ismio RO plus different sizes under furniture on hard flooring.
Mine have been under the Vesuvius for so long I forget when I put them there and of course it means you can slide it completely away from where you sit it to clean spills, dust, beans et al which would still give you the same issue if you sit the V on some sort of sledge.