Black Diamond Racing Shelf for EMM CDSA?

I'd wait for "The Shelf" 3/4" thick 17"X15" or "The Source" 1 1/4". I use "The Shelf" under my CDP, TT, pre-phono and power supply. All my equipment is currently sitting directly on the shelves and all the shelves sit on Sims Navcom pucks. I had to wait to snag them one at a time but I think it's was worth the wait as I like the sound using the BDR shelves.

This is from BDR.

"Made entirely of BDR’s proprietary Carbon Fiber Composite materials and finished with clear acrylic on both side.........., the BDR Shelf is massive and extremely non-resonant, absorbing enormous amounts of vibration: a BDR Shelf is only ¾” thick, yet it is 25x less resonant than an 8” thick granite slab and has 4 times the vibration absorbing power of 2” thick MDF!"

Rgs .. Right on . I've become unhappy with unstable things like springs , cones , balls , spikes ect . I have slowly started to go to solid turntable type platforms for all components with no lose in sound quality , in fact the bass has become firmer . Black Diamond is the product I found to be the best bang for the buck and one of the best sounding .
As far as your question , I would want a shelf at least as big as your component , the more mass the better too .
One of the above posters mentioned that the thicker shelfs are no longer available , I ordered one threw my local dealer about six months ago , that would suck I still need two more to complete the change over .

'a BDR Shelf is only ¾” thick, yet it is 25x less resonant than an 8” thick granite slab'? Better check your materials expert as the statement is not true. Yes, I am a materials scientist and know all the resonant properties of an 8" slab of granite, if you can find one.

ya' got to learn to do the "Samhar Snag". (that's how I got mine)

Just checked with BD , the thick shelfs are discontinued .
I thought I read that the shelfs were 25x less resonant than 8" of M.D.F.
If our materials scientist is still with us , is it true that sandstone is less resonant than granite ?