Stillpoints arrived today. First interesting thing: the size and screws are exactly matching Symposium couplers and so I can directly compare the 2 devices with no special adjustments. I used a set of 3 Stillpoints with 2 couplers on each, cone ball directly in contact with the turntable plinth.
And the winner is... Rollerblocks ! by far better air, slam, piano and cymbals sounding more real , bass is tighter and delicate. Album used for the test is Andrew Hill "Black Fire". No hesitation, the Stillpoints are going back to my dealer today.