Upper Level Vintage DD Strenghts and Weaknesses

I've settled for a Particular Plinth Material for Four Years on my 'Go To'
Japanese Vintage DD TT.

I have moved on from the Mass Design Plinths, the Granite Monolith is no longer with me.
I still have a Laminated Corian Plinth on a Idler Drive and a Lead Loaded Plinth on anoother model of a Vintage Japanese DD TT.

The Densified Wood is the next material of interest.
I have heard it used on Three TT's used as a 20mm (3/4") and a
30mm ( 1'1/4") Thick Material.
I have boards of it in a 75mm ( 3") Material, but those who know this product will inform that 75mm is a excessive thickness, it can be cut to produce a less thick board. 

The Plan now is actually to produce Two Plinths from the same Densified Wood Materials.
One Plinth will be used to support the TT Motor and Chassis as a Standard Mounting Method,  and the other will be used to support the
TT Motor only in a Design known as the Kaneta.

Each Design when produced will have the same Tonearm in use and the trials between the Two Designs will be undertaken using a selection of  Cartridges.

If all goes to plan, each TT will have a modified Platter Bearing using the latest technologies to modernise it and a stiffening to produce less flex to the Bearing Housing will be used.

A Phosphor Bronze Platter is being produced to Work on Each TT.
This is to be trialled against the OEM Platter and a Lamination of another
material added to the OEM Platter.

A Bespoke Phosphor Bronze Periphery Ring is to be produced to be used for the trials as well.

Trials of this type have been undertaken in another Country,
between the SP10 MKII 'OEM', MKII Kaneta and SP10R.
The reports have  been extremely positive and measurements are recorded and used to show how different materials are interfacing.

These reports are being taken as 'worthy of consideration' by myself and a friend, with the result being the investigations are a worthwhile endeavour and the efforts to get this opportunity to a fruition and share in the experince has started.

Another timely experince to be undertaken is the recent report from another Engineer Friend, who has very recently declared that their 
Brand New Design Tonearm is almost ready to be made available for Beta Trials.
It would be great to use this New Tonearm Design with the New Plinth TT's and another local friends SP10R, especially as the New  Design Tonearm can be compared with my Bespoke Redesigned and Rebuilt Audio Technica AT-1010 (PMAT-1010) and the Glanz 12" Arm on the SP10R.
Swapping the Cartridge, so that all the Cartridges used in comparisons are a match, will be a unavailable on the Glanz Arm and this option, will, I assume not be available, as the Miyajima Cartridge on the Glanz was set up by a TT Specialist with a Software.

The Autumn Months are looking like there will be a very interesting set of experiences to be undertaken.
      

it is right to report the experiences of all but I think it is essential to listen to more music and less attention to bullshit; life is too short to spend all your free time looking for an ideal plinth.

it is right to report the experiences of all but I think it is essential to listen to more music and less attention to bullshit; life is too short to spend all your free time looking for an ideal plinth.

Exactly.
Or to pay attention to seismic activity of the earth pretending your plinth can protect your cartridge when there is an aliens invasion while you're listening to your favorite LP.  

The Thread appears to be Wandering once more.

The OP has made it known in their first Post that there is an interest to receive information about Vintage Japanese DD TT’s from a particular era, and has helped that era be dialled in on by making various Models known that have been experienced, or are Short Listed to be experienced.

There is a Clear Comprehensive Inquiry asking about options on Plinth Materials, to which the Thread has supplied invaluable information to be assessed, with the added information on Sub Plinth Support,
I am thinking these are (Bonus Points) to an inquiry, especially the AT-616 suggestion.

There was also references made to complications that are known with certain Brands TT Models,
be it a Difficult to achieve support with Servicing, a cost associated with a pristine model, or a blatant defective condition known to develop on a Branded Model.

The OP has had confirmation offered on a concern about the blatant defective condition, but has not been guided on how to overcome the other concerns.
Maybe there is still somebody to contribute to this.

The Request for information in relation to TT’s and Plinths is to my mind quite broad, and this has been met with a invaluable offering from the forum members.

The OP’s rigidness on their choice of Tonearm has also been respected,
and they have been left to not have to be confronted with the suggestions of using a different Tonearm.
I hope this is a satisfactory outcome for the OP.

It is totally OK on a Forum to make an inquiry, it is not really possible to control the feedback offered, but as long as the information being made available has a relation to the request for information, all offerings from others will have a value to some degree.

Two Forum Members have recently chosen to make their thoughts on the information being offered to support the OP’s original inquiry Public.

One Forum Member for approx Five Years, and who as a Thread Creator in that time, has produced 'Five Threads' that are inquiries.
Recommends the OP’s inquiry on Plinth Materials and the other members contributions on the Plinth Material,
is in their words giving ’bulls**t attention and is a waste of time.
I am not convinced this is a worthwhile analogy myself.

Their encouragement to listen to Music is very welcome.

The other Forum Member who has been a Forum Member for approx Ten Years and Six Months, and who as a Thread Creator in that Time, has produced 32 Threads, of which 24 Threads are inquiries.
Of which some of these inquiries are extremely closely related to the content of the OP’s inquiry on this Thread.

This members has shown what appears to be a support for the recommendation of the above Forum Member.
I do agree that trying to detect Siesmic Activity whilst listening to a System would be a wasteful undertaking and is a good guidance to offer.

Additionally and ’hats of to this person’ for their humour, they have some how found a way to mock their usage of 16 x AT-616 as a method to protect their HiFi equipment from the effects of a Alien Invasion and a little activity within the Lithosphere.
Long Threads can do with a little interval that has a element of Humour.

@pinda   ... and then after your exhaustive reflection what should be ascertained?
Sorry but the summary is not clear. LoL