I recently carried out a Rega motor mount mod (sticky pads direct to plinth) on my old Rega Planar 3 along with a bearing clean and re lube and also motor bearings lube. After about an hour of playing records, a slight hum can be heard from the deck, but not through the speakers, thus I suspect its motor hum, never had this when the motor was suspended on the rubber band as it was isolated from the plinth, any thoughts.