Herbies mats come in various thicknesses and work exceptionally well and very reasonable pricing. should ditch that felt regardless not the optimum turntable mat imo.
http://herbiesaudiolab.net/ttmat.htm
Replacement Linn LP12 mat
I'm looking for some recommendations for a new platter mat for my vintage LP12. The original felt mat is a bit worn so I'd to replace it as well as upgrade it. I'd prefer not to have to adjust the height of the tonearm so I'm wondering if anyone can recommend a mat that's the same thickness as the original factory mat. I'm considering the Origin Live mat which is 1mm thick but I'm not sure if it's a good match. Thanks very much for your time and suggestions. Much appreciated!