TT mats

Saec SS-300 is great mat, very well designed, not only for "12 inch records, but also for "7 inch records. It's a lightweight mat which i'm happy to use on Luxman pd-444. 

Micro CU-500 is heavy gunmetal mat that i use only on Technics SP-10mkII 

Bondmanp: Sounds like what you’re referring to is about the same mat I’m using on my pioneer. It’s designed to drain any static charge into the spindle and dissipate it into the ground. I keep my humidity around 50-60% and use a Zerostat to be sure. I bought this mat over 35 years ago and it has served me well. It’s interesting to read all the comments on how my old Pioneer PL-71 in no way, can approach the same sonic quality of my VPI. I guess I’m just lucking. I must have hit the correct "synergy" by dumb luck. I did have to increase my tonearms mass, then balance out the tracking force.  Being 63 years old, I can't hear much above 12K.  Maybe I'm not hearing what others still can.

I apply a constrained layer damping solution to my SP10MK2 I use a K-works ERSA mat on the platter then a 1/8 technics rubber mat topped off by a Boston Mat-2 . I use a Michell clamp to couple the record to the stack .I feel this arrangement handles the two things a mat should address isolation from the motor and the resonance caused by the stylus groove interface .I believe a TT should be as inert as possible an add no color to the sound .The ERSA mat is made of ERS paper being the motor is right under platter I thought it was a good idea to use it in this application .

enginedr1960, Are you blocking EMI with the ERSA mat?  I ask because this is worth doing for some DD turntables.  On the L07D website, one is advised to do something about that, even though the L07D has a 5-lb stainless steel "platter sheet", which one would think has at least some effect on blocking EMI radiating from its coreless motor.  Nevertheless, and in agreement with the advice on the L07D website, I hear improvements with a piece of TI Shield between the platter and the platter sheet.  I have had a copper platter sheet made, which mimics all dimensions of the stock stainless platter sheet, in hopes that it will better block EMI, and I will be able to remove the TI Shield.  It's "in the mail" coming to me as I write this. (TI Shield causes issues with some LOMC cartridges, because it contains iron; the L07D motor stator induces a magnetic field in the TI Shield, which sucks down on LOMC cartridges. No free lunch, I guess.)  

@lewm - The K-Works Ersamat does claim to block EMI from getting to the stylus/cartridge.