Albert Porters after market panzerholz plinths

If the M-S mat weighs 4 lbs, consider that the platter + mat now weighs over 12 lbs. (If memory serves, the MK2 platter alone weighs about 8 lbs.) This represents a nearly 50% increase in mass over the stock platter + mat (8 to 9 lbs total). I'm just sayin'....
Maybe it's harmless; maybe not.

I can definitely see where a copper or metal mat in general could liven things up assuming the table drive can handle the weight!

i like copper too.

On the MkIII, the Cu-180 mat isn't a problem. It's a bit iffy on the MkII, however. It's not about the total mass of the platter but rather its moment of inertia. The amount of correction the MkII servo system makes in case of speed variance is related to a fixed value for moment of inertia. The total moment of inertia with the Cu-180 added is almost twice the stock value, so speed correction will be inaccurate, though possibly not audible.

John

I've seen some carbon fibre mats that might have similar properties but lower mass for tables that might not handle a 4 lb copper mat. They are not cheap but less than copper also I see.

Lewm and John what you say makes sense to me I'll pass on using the micro and try something close to the weight of the original mat when I get to that stage
Mikelavigne interesting line up of arms and tables I take it one or two in your line up plays large scale music better then other?