@dogberry I know 😎, the bait is laid.
I am totally adhered to the Rigid Coupling Methodology, I was offered a option to have a Armboard Machined, which I declined for the One Plinth Material only philosophy.
The individual offering me the option has chose the Machined Armboard Option to mount Two Tonearms up to 12". This is to be used with a TT>Tonearm Identical to my own go to TT Set Up, as well as a selection of other immediately available Tonearms.
Where the two above Plinths now separate further, is that the producers second owned TT of the same model, is now in a condition that is to be used with a P'holz Chassis, that will also mount Two Tonearms up to 12"
Another TT owner, with the same family of TT, has as already made known, chosen a Standalone Tonearm Pod.
I get to be demo'd all methodologies and that is great for me and others who choose to be present when the demo's take place, no reason why one of the pair of owned Identical Tonearms don't end up on the Standalone Tonearm Pod, as two near usage identical Cart's are ready for this Trial, and will be used on all Tonearms being compared.
All philosophies for mounting a Tonearm are pretty much exposed to be subjectively assessed.
I am to be open minded, but as a initial thought on the upcoming trial, I really don't see much to be discovered if the TT Plinth, Chassis and Standalone Tonearm Pod are mounted with a same Tonearm>Cart on a Densified Wood Sub Plinth.
'Standalone Tonearm Pod' is looking such a lovely morsel to be picked at on the set Traps Plate.
Lets see which are those, whom choose to tell another how to mount their own Tonearms in conjunction with their own TT/TT's in their own Home.