The DP80 Plinth Has Been Started

For a DD plinth, and given my own conviction that DD TTs do better with a high mass plinth, delrin might work if layered with a more dense material in a Constrained Layer Damping type of thing. I expect that would be difficult to manufacture however.

Being an individual who has experienced TT's that are the same model or models with similarities in how they function mechanically, where a broad selection of Plinth Materials are used as follows:

Plywood Boards of different densities and bonding methods - Bamboo Board - Hardwood - Composite Resin - Stone - Metal Coated Wood. I was able to make discoveries of what I was preferring as the mechanical interface on a couple of different drive TT's.

At a later time, I was able to experience the same TT model - same tonearm design- same headshell part on different plinth materials. There were cartridge changes involved to extend the learning attained. It was this experience that underpinned my already made decision for a use of a particular Plinth material.

I have once been very familiar with how a variety of plinth materials produce a mechanical interface with a few TT types, and can only suggest very strongly that an individual can completely rewrite their own rules when having been demonstrated the effect of the mechanical interface on the end sound produced, as the different materials are demo'd and evaluated for their interface value.  

@neonknight - I love the look of the DP80. You’re pulling me closer to the rabbit hole

For DYI plinth material I’m enamored with Panzerholz or similar. Maybe someday a Garrard 301/401 to discover the idler “musical drive”. But Panzerholz is difficult to obtain and a challenge to cut. 

Panzerholz is not unique; it is a resin-impregnated, densified wood, typically weighing in at nearly 1400 kg/m³.

The production process includes a vacuum chamber, heat, and high compression of the veneer materials.

In general, it is best to have cross-grain stacked veneers of 0.8 mm- 1 mm thickness. The end compression is usually to 50% compressed material.

Note: The more veneers used in a given thickness will result in more dissipation being on offer; Damping will remain similar to a wider range of board construction.  If a 0.6mm veneer can be found as a 25mm thick board, that will be quite attractive. 

Using the above info, Brands who produce these board types will be discovered in one's own Country.