knownothing thanks for links. That post got a bit more granular than my short attention span could handle, but interesting. It made me look under cork matt and I saw the plinth does have a recession for label as mentioned in that post. But if platter is made for direct surface contact with vinyl, why does a matt come with tt?
Oddly, Ive played records on ever increasing quality systems and never considered clamps or weights. The clamp link you sent seems like a decent inexpensive device to try. So IS THAT the main purpose of clamps to prevent slippage?
Another note, I have multiple layers of isolation under tt. 1st mdf shelf, padding, granite, padding, wood, rubber, spike legs and the unique 3 layer plinth on the mmf 9.1, but when stylus is on a record, gain up on pre amp and no music I can tap on system mdf shelf and hear the thumps amplifed to speakers. I dont think any matt will stop that. I kind of wonder if the stylus is picking up my finger thumping through the air?
However, very good and great vinyl recordings sound very good. It just bugs me how that thumping can get through.