Having trouble reducing the vibrations on my turntable setup

Get Symposium Ultra Stealth the best ASAP.

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...
The improvements in sound were as profound as any upgrade in my system. I was floored.

DO Nuclear subs and CAT machines use SRA isolation devices? I’ve been around a lot of electron microscopes, and they don’t.

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.  

Oh, it's not tricky at all- they are all over the place! Problem is, they move around depending on the frequency. That's not the worst of it. Look how many there are in the midrange frequencies where we are most sensitive! 
https://youtu.be/WmwnN_T_wW8?t=40

I have a friend with the clear audio table and he uses Pneupods by Pnueance Audio. They make special adapters that allow the pnuepods to screw right on the bottom of the table replacing the original feet. You can knock on the platform the table is sitting on and the feet prevent vibration. He hears no thud out of his speakers and has no feedback either.