Fat Dots would provide equivalently effective decoupling. Because the material has some compliance, X-Large Fat Dots and Giant Fat Dots are best used between flat surfaces.
I'm not sure how wide the narrow legs are on the Segment-X rack; with much weight on them, they might indent or punch int the Fat Dot dBNeutralizer material. With its reversible stainless steel disk, that's not a concern with the Giant Fat Grounding Base. Teflon bottom also allows use on carpet or rug.
The Giant Fat Dot and reversible disc can be easily removed from the Magic Slider and used solo if you like.
Herbie's Audio Lab