I have Clearaudio performance DC with no mat our platters are made out of the same material I do use a record clamp. when I had a Rega with a glass platter I used a suede mat no static like the wool one that came with it the Glass is so hard without it it would ring. Clearaudios uses a material similar to the record if you clamp the record your 180gram record now weighs a few pounds no vibrations between the record and platter