Will, I've replaced the feet of my VPI SSM with Rim drive with the TerraCone feet per Steengreen advise (thank you, Steengrean!). Improvement was not SUBTLE! I have springy wood floors with some vibrations making to the turntable. I used Symposium Acoustics' Ultra Platform but it wouldn't eliminate all the issues. Addition of the TerraCones totally decoupled the turntable - no more dog or kids steps in the speakers nor tonarm's wobble. Bass became very tight and deep, sounstage - from wall to wall
VPI Classic---replacing stock feet: my experience
Anyone considering using heavy brass footers to replace the stock feet on their VPI Classic may want to think twice. After reading about this being a "major upgrade", I tried it. Well, not only did it not make any sonic improvement (whatever that was supposed to be), but the brass footers had the effect of amplifying the sound of the turntable's motor. A constant and distressing low, pulsating hum was introduced just below the music, and it was particularly obvious during quiet passages. Any anticipated sonic improvement, had it manifested, inevitably would have been rendered useless by this motor hum. My VPI Classic sits on a Mapleshade component rack with 2" maple shelves, with nothing between the footers and the top shelf, so YMMV.
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