About 10 years ago I stopped in at a local hi-fi shop, a small operation that never abandoned 2-channel or analog, and accepted consignments and trade-ins. I was looking for a right-sized mat with better damping for my Technics SL1210M5G. At first I was hoping for one of Technics' heavier "supermats." Although they didn't have one of those, they *did* have an Oracle Groove Isolator, exactly the right size for the Technics, and made of the regular Sorbothane, not the gel mat marketed by AudioQuest at the time.
They were asking $10, which was fine with me. I took it home, did a little experimenting and listening, and wound up with the Technics felt cueing mat directly on the ring-y aluminum platter, and topped it off with the Groove Isolator. I find it to be a good balance, with air and detail, but also a lowered noise floor and improved dynamics.