Till now I have tried to keep things simple with my garrard by using a good multi-layer birch ply plinth and using some cones to rest it on the rack. But it is now getting painfully clear that this is not a very well-sorted system. The noise floor is high, the images are grainy, the air and tranquility is missing. When I tried some softer footers, it did wonders to the sound by bringing back the air and lowering the noise floor, just that it was again not a full proof solution.This suggests that the plinth thus created was not dead- and may have been imparting vibration coming from the stand. I say this because the soft footers helped, which suggests that they are isolating from the vibration source.
This is why a massive platform is helpful- it can be isolated from the stand if need be by the squishies and then the 'table hard-coupled to the platform. But that only works if the platform really can sink the air-borne vibration away from the 'table.