I highly recommend Minus K for non suspended turntable. I used to have my TW Acustic Raven AC-1 on Symposium Ultra sitting on top of machine shop bench which has 4 inch granite table top with steel legs. The whole thing weigh about 100+ kg without the turntable. Replacing Symposium Ultra with Minus K was remarkable and in my opinion, well worth the difference in price of the two platform. I don't have problem with subsonic rumble or acoustic feedback through the floor but sonic benefit alone is quite impressive. I also heard VPI Classic 3 to good effect on Minus K. There is even a review of Minus K on suspended table like Linn floating somewhere in the internet and there is a recent review of Minus K on Positive Feedback wiht some comments regarding Minus K vs older version of Vibraplane as well.
