Late to the party. Linn likes light mats - good for suspension tables anyway. I have the 3mm Funk Firm Achromat that seems to quiet things down quite a bit. Recently, I also put my modded Linn on homemade decouplers of ball bearing in wooden cups. Between the two tweaks, my playback has a quieter background and some improved detail and dynamics. I like both individually and even more so together.
