Went through the whole trying out mats things on the modding my 1210 journey - Too many to mention including The Speed, felt, Acrylic, very expensive Oyaide-MJ12, Achromat, you you name it, tried it.
Always went immediately back to the original 3mm softer stock rubber mat as supplied with my 1210 - Just always sounded right compared to the others which just changed things, dulled, sheened, glared, overly dampened or otherwise, just never sounded natural like the stock mat.
It'll be the same with my SP-10 - stock mat, no question as I know it will be the best, most natural platform for me and the music. Have read others say the same - each to their own of course, I know what sounds right to my ears
A lot of people find the same with various turntables Robbie. The Lencos and Thorens standard mats are liked best by many owners on the respective turntable. I found the same with mine. Garrards seem to benefit from mat changes, as does my stalwart Toshiba SR-370.
I used the Reso-mat on a few decks - worked really well with some, not so good on others. Worth a try at the price.
They even make a special size one to fit inside the platter rim of a Techie 1200. I liked it on my 1210.
No good if the platter needs damping, though - the ultimate there that I found was a French Spectra Dumpa mat; very heavy, thick and a bit sticky! Needed fairly regular cleaning. ... "In France the Spectra turntable mat was introduced. It consisted of 3 layers of different kinds of polymer, each with specific properties. The surface provided a firm grip on the record because it was sort of 'sticky'. A record was not easily lifted up. This mat provided a remarkable transient response which was more situated in the upper regions as with a felt mat than in the fundamental frequencies as in harder rubber mats or the acrylic mats. The diameter of the Spectra was too large, 300 mm instead of about 280 mm. Records with a thick groove guard were not always optimally supported."