Jazzhead, yes, Shun Mook Diamond Resonators. They come in 4 sizes, choice dependent on the weight of the component to be isolated. Mini, Super, Ultra and Giant. The ever-persistent Kedar/Bonzo75 strongly suggested to me that I should try them, in his case he's replaced Stillpoints in his rig w/them.
We had a set of Giants which I placed under my 70kg balanced transformer, and Ultras which I placed under my 25kg S. Tellus. The previous yr I had tried Stillpoints under my S. Tellus and Atlantis Tellus box when trialled, and have a reasonable aural memory to make a comparison.
The Stillpoints were interesting in that they emphasised dynamics, heightening the leading edge of notes. To my ears imho I felt they were a little artificial, and while the presentation was undoubtedly exciting, I feel they introduced a little too much "fizz".
The Shun Mooks are almost the opposite. They initially introduce a sense of composure, and after a few minutes w/them, I got accustomed to a real sense of organic tone, w/an amazing ability to unravel complex basslines. Mooking out the transformer and Entreq has allowed the whole system to benefit, and tbh the emphasis on tone suits my biases more than Stillpoints, reflected in my choice of Zu spkrs, Audion SETs and Sablon Audio cables, Shun Mooks really complements those three brands.
Unfortunately I had to take the Mooks out prior to the arrival of the S. Cleanus/Olympus Mini, but I can't wait to start Mooking out the system in a little while w/these extra Entreq boxes in tow.