Thanks for this.
I was at Ikea on the wknd looking at those tables to make a stand.....I ended up electing not to. The APTITLIG butcher block cutting boards I purchased (but the ones without the groove) and today I should receive an Amazon delivery for a product similar to those anti vibration pads. (I was going to use them under the components.....but will keep these ones you mention in mind for the speakers)
Much appreciate all the investigation(s) you have undertaken.