I've also replaced my Classic's stock feet with Eden Sound Bearpaws and never looked back. I actually didn't notice that much of an improvement in bass, which was pretty good in my system already, but noticed a significant improvement in high frequencies, resolution and overall detail. I definitely have NOT experienced any hum after I put in the brass footers. My Classic sits on a 3-inch maple butcher's block and Mapleshade Isoblocks. I'd look elsewhere for the cause of the hum.
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.