Lol, erm no... Simply because one 'layer' only isolates the equipment to a certain degree. Therefore, the effect is increased cumulatively by additional 'layers', simply because the issue of vibrational energy, adversely affecting equipment performance, is always present to a certain extent, thus never fully eradicated.
Of course, like anything else, the improvement gained is subject to the laws of diminishing returns, and so rather like wine, once you get past the £20 a bottle mark, further improvements become much more subtle... From experience, I'd say that the sweet spot is 'Phase 4' - i.e one rack and three additional'layers', but the difference, sonically, between that and, say 'Phase 15', such as I have, is significant and worthwhile, somewhat like upgrading from a 10 year-old single malt, to a notably superior 15-year old
However, an indisputable advantage, with 'tall stacks', such as mine, is that all your gear is at a convenient height to work with (unless you're a midget, lol), so there's none of that getting down on your hands and knees to change kit or cables, which I detest, plus I've also ensured that there's similarly plenty of room at the back to facilitate neat 'cable dressing', rather than jumbles of cables looking like the usual out of control 'spaghetti'!
All my cables, both mains and signal, are well up from the floor and away from side walls, fully separated, and hanging neatly in free space, which not only sounds better, but makes it a damn sight easier to work with
In any case, it's pretty pointless (unless there's anything in what Grant said) discussing a defunct and long-discontinued product, unless anyone here was sufficiently motivated to go down the route of fabricating the design, and making copies, as I did, and in which case I'd be more than willing to help
Marco.