Re: ack's too long to quote post above
I think this may be why Stillpoints can offer more than the other ball-and-cups, because there is some other form of decoupling material technology in there. I wonder if Gary could chime in on the (non-proprietary) aspects of his speaker's bases.
If you watch their video (recommended), in the first minute they claim they use ceramic bearings and stainless steel, nothing else. But you could be right.