First off, if you've been wanting start a thread, then you should! It's free and hijacking an existing thread is generally frowned upon.
As to your questions, the felt washer is meant to lift the middle of the record slightly so that by pressing down when you tighten the clamp, the perimeter of the record is forced against the platter. The slight noise in the dc motor is normal.
As to your questions, the felt washer is meant to lift the middle of the record slightly so that by pressing down when you tighten the clamp, the perimeter of the record is forced against the platter. The slight noise in the dc motor is normal.