I was pipped to the post, see the Link, and another source produces a P'holz Platter for the Garrard 301.
I am from the school where certain materials are at there best if Homogenous, but 3D printing and the substrates that can be used are slowly changing my school of thought. As stated recently the audio industry or DIY entity are very close to seeing structures produced from mycelium spores being formed into structures. If it good enough for Formula One it has a place everywhere that needs eco friendly structures to be produced.
Houses are being produced out of mycelium blocks in earthquake areas, as the blocks have energy dissipation that surpasses other typical and affordable building materials.
My own SP10 Mk II as a Kaneta Design, will be tried out with a stacked Platter using different configurations for the Stack.
There will be original platter on original platter, the same again with top platter filled with Newplast Modellers Putty (Newplast measures as a damping material very similar to a Resin Impregnated Densified Wood), Acetal is already available to be machined as a top plater, Phosphor Bronze and SS are both available as Platters which can be used as a sub or top platter, P'holz is another, which is already discussed to be considered, but I think will be a later down the line introduction.