Having trouble reducing the vibrations on my turntable setup

What is the  Delos butcher block sitting on? How stable is the stand it sits on?

I have a ClearAudio Innovation Compact with Universal arm. It sits on a VPI turntable stand filled with sand. On top of that is a butcher block that sits on cones. My turntable sits on the butcher block with no special footers. My setup is dead silent. No rumble or noise if you walk by the stand.

 The Innovation turntables have magnetic bearing that should isolate the platter. Where is this rumble coming from, the motor? There could also be some type of problem with the setup.

Any shelf will vibrate at a certain frequency.  Depending upon that frequency, there will be regularly spaced nodes that remain stationary even while the shelf is energized and vibrating.  If you can locate those stationary nodes and place the points of your cones directly on those areas, then the cones can provide isolation.  But it's very tricky to locate those nodes.  Use a stethoscope.  Or I suppose it is easier to choose another type of footer.

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IME, SRA VR platform under my Woodsong Garrard 301 was a night and day difference. I am sure that there are other excellent devices but Silent Running Audio has 40 patents and three companies. One for Audio, one for Medical/Science and one for Military. If nuclear submarines and CAT machines use them...
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DO Nuclear subs and CAT machines use SRA isolation devices? I’ve been around a lot of electron microscopes, and they don’t.