I used to place it on 黑麻石, but the sound is to solid, later I tried different coins, but not quite satisfy. Finally, I end up using isocl---釘墊. Quite recently, I saw the ad. and thought original FD 釘墊 might be better than isocl--- . To my supprise, may be in my room tune, the result is isocl--- 釘墊 better than FD釘墊.
Theta Jade
ML360S
Cello 1M Encore
Krell 400MCX
MA Studio 10/ FDII
Pioneer LX83