I use a pair of Hudson HiFi acrylic mats on my Technics SL-1700MK2. I had to stack two of them on the platter since my Audio-Technica AT-OC9XSL is so small and my VTA is all the way down to Zero. From what I can hear, there's no ill effects from having two of the mats stacked. And honestly, the two of them stack is just barely taller than the stock Technics rubber mat.