I'm using the OMA carbon mat which is similar to the Boston Audio 2 only thicker and it's designed to fit the the recessed SP 10 platter exactly.
Probably the best value is the Herbie's "way excellent" 2 turntable mat. They have a 4mm thick, 292mm diameter version that fits the SP 10 platter. It's around $75 and has a 90 day home trial so you can decide for yourself.
Probably the best value is the Herbie's "way excellent" 2 turntable mat. They have a 4mm thick, 292mm diameter version that fits the SP 10 platter. It's around $75 and has a 90 day home trial so you can decide for yourself.