Tonearm mount to the plinth vs arm board vs rotating arm board vs isolated tower

I think that it was Einstein that said  “Does the Station stop at this Train”

Now I know that I’m stretching the point a little but as Atmasphere said, to paraphrase..Relative movement between the arm mount and the platter is a bad thing.  We can have them both move in sync, within reason. 
If you agree with this principle, the arm mounting design options are narrowed considerably.

Amateur?    Hmm. 
I would point you to this post.....

 OMA (Oswalds Mill Audio) Debuts K3 Direct Drive Turntable—An AnalogPlanet Exclusive Michael Fremer  |  Feb 28, 2020

There is an interesting conundrum at play here.
I quoted Einstein quite deliberately.
”Does the Station stop at this Train?

Looking at this another way, if the Station and Train are rigidly coupled together AND moving. A passenger in the train looking at the station will observe no movement.  
The challenge for the TT designer is to keep the relative positions of the platter and arm board constant under dynamic conditions. Does it matter if they are moving about provided they are rigidly coupled.? Obviously yes if this movement is large or violent because the acceleration will impact the arm and cartridge. But what happens if the movement is small and benign? 
Keeping the two parts still relative to each other isn’t easy. There is a YouTube video posted by Peter of Soundsmith where he quotes an Ortofon engineer who states that movement of 0.005 micron can be traced by a cartridge.
This tiny amount is almost beyond comprehension.

I echo Lewm's comments re the Helix TTs.
Mark Doehmann's design is innovative and unique. Way cool. I have heard them a number of times and they are exceptional. 
I have also met Mark twice. He is totally open to sharing his extensive knowledge about TTs and the industry in general.  A true gentleman. 

Yes, while Mark and I have taken significantly different paths in our designs, we both agree on the fundamentals. We just approached them from different perspectives.

Halcro.
Quite a number of people have reported on the efficacy of the Herzan stands and their equivalents.
Out of curiosity what do the three graphs, V, H1 & H2 represent? Velocity and frequency?

How does the stand reduce self noise in the TT structure itself?

Cool
How much weight can the Herzan carry?
Cost?

Self noise generated by the action of playing a record.
What do we do with this energy?
Sink it, dissipate it in the TT structure, both. 
Cheers 

Atmasphere
"Or you could use a mirror mounted on the item under test, a laser and a sound source to demonstrate how a separate arm pod will not vibrate the same as the plinth onto which the platter is mounted, even if both use the same construction techniques!"

Have you tried this technique? It has been a thought experiment of mine for some time now, but I have never actually run it in practice. 
Easy to get more than 1000x gain with this technique. 
It would be most informative  

Cheers