Placed the maple butcher block on three cones solid brass (facing up) on the top of the record shelves (same shelf / position as before). Placed the Aries Extended on the butcher block. Put three stillpoints under the table at the approximate position as the cones under the bb. Adjusted for level.
There was an improvement. Dynamics seemed a bit shrper, bass a bit tighter. The subtle warmth around the lower registers of a harp and clarinet was reduced providing more detail, particularly woodiness of the clarinet.
Maybe the soundstage was improved. Maybe. Maybe the imaging was a little tighter. Maybe. Maybe tenor and also voices were a little more natural (less chesty, but since its vocals, who know what they REALLY sound like live). Maybe.
My conclusion is that the ~ $120 investment was worth it.
I do intend to try a set of dedicated rigid shelves that are "coned" directly into the concrete floor with the table sitting in a configuration with the maple bb like above. Not sure there is much room for improvement, but it might be worth a try.