or an even better way of stopping deck feedback, **** off the technics and get a turntable that wasnt designed in the 70's.
i regularly use vestax and numark decks and have never had a problem with feedback, a couple of weeks back i did sound for a party and the dj's insisted on technics and despite concrete slabs etc the decks fedback any time the bass got anyewhere near loud.
i do soundsystems for clubs as my main line of work, and although i owned technics for over 13 years, i wouldnt think about buying a pair now. numark ttx-1s all the way.