2020 update : JC Verdier La Platine

A good friend of mine is a plywood manufacturer and supplier. The highest grade plywood he produces is known as ‘ Finnish plywood’, density around 680 kg / m3. He produced an even denser Fin Ply for a Japanese client who uses it for the innards of the arcade machine Pachinko. I asked him about Panzerholz which he was not initially aware of. After some research, he commented that  it is a very sophisticated version of Finnish ply. Certainly at 1400 kg / m3, it is more than twice as dense and heavier than Fin Ply.  But there are audio manufacturers who use Fin Ply. The Wand TT has a Fin Ply plinth. 
 
@mr_gray Would you PM me  regarding details of Galibier’s motor, pricing, delivery date …etc. Thanks!

@ledoux1238 i surely will.  right now Mr Mackris is saying the standard unit will be 5.2 inches high (~ 130 mm) and cost is $3,750 USD.  He intends to offer us La Platine people an extension that the motor can sit on as i need 180 mm or so.  

Further details to follow.  He tells me the parts will be machined in 4 weeks and from there assembly will begin I'd presume.

re: motors my sense of things now is:

1. my Verdier DC motor was a bit worn out i think.

2.  the new AC motor sounds fabulous partly because by DC motor was "poorly".  so strong!

3.  however once that wonderful tempo and huge deep soundstage is heard and one grows accustomed, one can hear some slight "woolliness".  Not alot and things are quite fabulous but a tiny bit.  

4.  it is plausible i am hearing "cogging", i.e. it is this inconstancy of torque that creates this "woolliness"

5.  i see online  DC motor is preferred for least noise - i found this puzzling until i realised that my personal DC motor on the la platine being the only example of DC motor i know of is the issue there.

6.  it would be fun to now try the origin replacement motor solution (or the SOTA) and see how healthy newish DC compares with the AC but i think i will leave that to Galibier and focus on my knitting for now.

@mr_gray 

Not having tried a AC motor, I cannot comment on its merits. But based on your reporting on AC motor, the  three phase SOTA AC motor was on the top of my list as replacement. 
I also think one critical aspect is the coupling of the belt / thread to the platter. On this thread, and several others I have read, there seemed to be a consensus of applying a loose coupling of belt to platter with the La Platine. The idea is to allow just enough force to allow the momentum of the heavy platter to maintain consistent rotation. However, my last experience using a very tight coupling of belt to a rather generic Jasmine DC motor yielded sonic benefits that I never got with the loosely applied thread belt. This leads me to think that using a tape thread with  more contact surface  to the platter and a tight coupling is in fact the way to go, regardless of the type of motor used. This gives the nod to Galibier’s motor system. And round and round I go arguing between the SOTA and Galibier motors. 
 

I did manage to briefly use Mylar tape with my platine and the new motor. The sound was very compelling. Like a garrard but more. And as u say this is where experienced parties have ended up such as galibier. 

If a look at the history of using Panzerholz or Permali on Lenco Heaven, it will be seen that a Plywood Brand Multiplex MU25 had a popularity for being used and was migrated away from to the denser board materials.

MU25 is a densified Plywood @ appox' 800Kg/m3.

I own a Plinth produced from MU25 and a friend had a Plinth produced from high quality Marine Plywood, using the same TT>TA>Cart', and using the same Sub Support, both are compared to P'holz and both are superseded as a Plinth Material by P'holz.

On owned TT the difference is substantial and the P'holz as a betterment is easily discernible.