I got two MyMat. The one I have on the bottom has the 4" hole and then the one on top has just the spindle hole. The pliability of the material allows for the 4" record label to depress to the first MyMat. SQ is remarkable, certainly a very good improvement over the felt mat I had.
Just finished cleaning a dozen records in the Degritter. My tubes are warming up and I will play some records in just a bit. Tonight is a better test, though. Dim lights and some wine always improve the SQ. I'll play familiar records to those settings in order to maintain consistency...😁