I have a planar 3 and an orbitrac and I always use the non-skid pads on the kitchen table because I don't like the idea of putting that amount of pressure on the turntable bearings, and possibly bashing the arm as well.
Also I have found that very dirty LPs come out better using the orbitrac pad soaked in pure isopropyl alcohol (99%) and then rinsed with distilled water and carefully dried with paper towels. It seems to get more of the crud off.
Also I have found that very dirty LPs come out better using the orbitrac pad soaked in pure isopropyl alcohol (99%) and then rinsed with distilled water and carefully dried with paper towels. It seems to get more of the crud off.