Albert,
I have been using the Micro ST-10 weight for about 30 years on various Technics SP-10's, it has basically become part of my left hand when I put on a record. My wrist has been kept strong due to its 1Kg weight and I must confess to dropping it once destroying a record. I believe this was sold as a mate to your Micro mat. It came with a rubber disc to be used under it or the disc. On close inspection you can see that it is "decoupled" from the spindle with brass/rubber bushings and it is not just a heavy weight.