I had a neat rubber one called the PIG (I think) dirt cheap if you can find one somewhere. It was a fairly common offering back in the 80's and was especially good for short spindles. Easy to put on and off. Record clamping, threaded or otherwise, vacuum clamping etc, used to make for endless discussions back in them dark ages. Then Peter Belt came along...now add the kind of mat into the mix and it's real fun! I had a Rega for a long time and use a thin felt mat andthe Pig. Had to use the Pig otherwise there was slipage between the mat and the platter. God this stuff makes me feel old (and melancholic)