David, you said, "I like proper mass loading to other types of stands and racks." I don't understand because it shouldn't be an either-or, but rather it should be both-and. In other words, for a methodology to even stand a chance at functioning at its optimal, the methodology must be carried thru to its fullest extent from A to Z or start to finish.
I don't disagree, everything is important, must be properly engineered and manufactured, this doesn't mean complex.
For example, a few pages back I included a picture of an empty rack I use which adheres to the resonant energy transfer methodology. But that picture doesn't quite tell the whole story. For example, my mono-block amps are under roughly 1000 pounds of compressive force into its shelf (I by-pass standard footers) to ensure my methodology is taken to the utmost extreme when attempting to create a superior conduit for mechanical energy to travel between normally disparate objects.
You're very tight lipped about your rack and its impossible to make any kind of visual assumption based on your dark pictures !
As for your trick to making sure that the shelf / materials don't randomly push / suck out certain frequencies? In my experience, this potentially becomes an issue only when inferior materials, designs, and/or methods are employed.
Not my trick, there's no shortage of hype, BS and bad engineering (if you want to call it that!) in this industry.
david