Ron, I think the consensus reached by all is that belt drive is not best served by active. Passive solutions like Stacore have a major advantage here.
The question then is whether Stacore as a ground-up audiophile solution passive platform w multiple approaches incl extreme mass, pneumatics, ball bearings, and constrained layer approach, indeed properly beats alternatives like Minus K and Vibraplane.
Purely from a specs pov, Minus K should be unbeatable, with a resonant frequency well under 1Hz. However, it really failed in my system, being audible in all the wrong ways. The Stacore beat it so easily, it was no contest.
After a few years now of having a ton of stuff in to test and demo, it's become easier to discern what's euphinically coloured, or just plain coloured wrong, and what is essentially inaudible in itself, only apparent as a flowering of the sound with top to bottom impvts, and no downsides.
And Stacore fits into that latter category, to my ears reserved for so few products. It's a fact that it's been the very foundation for a totally revolutionised analog sound in my room, that after my comparisons w Minus K and active Kuraka, shown to be wholly superior, makes it hugely special and totally irreplaceable here.