I think that we may have reached a consensus.
Target, Rega and Project wall shelves all work well, but are not designed for heavy or suspended turntables - hardly surprising.
Audiotech and TP Vulcan shelves are audibly better, though not necessarily vastly so, and are not made any more.
Mana are not simple, not (to most of us) good looking and take some work. In any case, they have not been made for years. JW may be available to produce a shelf as an individual commission, but that hardly sounds like a solution for most of the thousands of LP12 (or other suspended deck) users.
Quadraspire’s bamboo shelf has had good comments here and elsewhere but may not be ideal for an LP12 in standard form. If I have understood correctly, it can be made better than standard Quadraspire (or cheaper) options with their brass spikes and other changes, but that too seems less than ideal.
Solidsteel WS-5 shelf has several devotees, but many go on to say that they think it much improved by adding a heavy wooden block to it. This again does not suggest that it is as yet a perfect solution.
There are vast numbers of LP12s out there! And what about all the Michell, SME, Vertere and Roksans, plus all the US, French and German turntables?
It looks as if there is a big opening for a really good walk shelf. It will need to be audibly better than Target/ Rega/ Project offerings - at least with heavier or suspended turntables. Given that many on this site have £15K+ invested in their turntables, and given what Naim Fraim kit costs, spending £800 or more on a good shelf would not be a surprise.
Perhaps we should all stop asking Naim for a replacement for the NAC 272 or N-DAC or Core. From this thread, it looks as if what we really need urgently is a Fraim wall shelf for turntables. After all, as pointed out above, Naim now makes a rather fine turntable itself.
If it sounded great and looked good, how many of us would buy one?