I have had tremendous success with Feet of Silence by Solid Tech. I think the greatest advantage to the FOS is that you can use them on virtually any surface and get consistent results. I found this review on Audiogon. I have used FOS in my system for years- I would be hard pressed to ever change.
https://forum.audiogon.com/discussions/review-solid-tech-feet-of-silence-tweak
https://forum.audiogon.com/discussions/review-solid-tech-feet-of-silence-tweak