I have done all the experiments. The best I have found is: fill your stand with a filler material, I use small pebbles (buy by the bag at Home Depot or Lowes) not as messy as sand. If your stand has spikes use Herbies
Cone/Spike Decoupling Gliders under the points. Between the speakers and the stand use Herbies Thin Fat Dots.
https://herbiesaudiolab.com/collections/loudspeaker-rack-decoupling-and-isolation
Try not to listen too much to roberjerman and experiment.
https://herbiesaudiolab.com/collections/loudspeaker-rack-decoupling-and-isolation
Try not to listen too much to roberjerman and experiment.