New aftermarket plinth for Technics SP 10 MK2/MK3/R from Acoustand

My friend used a Grace arm without a spacer on his SP-15 which also comes up, I think more than the SP-10

Rich, I had my mk3 plinth made of slate and solid cherrywood.  Nestled in the cherrywood base is a solid chunk of brass that is in contact with the bearing à la Porter. He uses iron. I was loathe to place such a large chunk of iron so close to the magnet rotor.

@rich121 If that base is different material from the chassis of the 'table, the difference in vibration between the two (for example if the base is more still) can be interpreted as a coloration. 

If the material is the same but there is a damping layer between them the same thing can happen. 

@lewm 
Lew, what I was thinking, but even though Al is not nearly as dense as cast iron or brass, wouldn't it be better to keep with the same type material to avoid 'smearing'?

@atmasphere 
The escutcheon and the outer/bottom body of the MK3 are also Al, but obviously thinner.
The ultimate would be to remove the motor from the escutcheon/body and mount naked, which a couple different aftermarket plinth manufacturers have done, as that would illuminate all the distortions that they pick-up and add.
This can be done easily with the MK3 as the electronics are all in the isolated controller and the speed and start/stop buttons on the escutcheon can be eliminated.