I got hold of an old Linn Axis turntable in very good shape a few months back and its been working great all the way through. Only recently, when I put on a very heavy weight vinyl (180 gms plus), it runs slow and out of tune. No such problems with lighter vinyl. Does this mean the turntable belt needs replacing. I dont know how old the current belt is - my guess is pretty old. Is there anything else I might need to check/do - oil change? Replacing the belt seems completely straight forward. If I need to change the oil as well well, where do I start. Where is the oil housed in a Linn Axis?