I am always fascinated from technical solutions and an idler drive is THE best (by far) way to transform any vibration and smearing from motor to the bearing and platter. These distortions are called Rhythm (well, the" Subway below Kingsway Hall" in every record), the loss of High frequency information is a result in better Bass (like a compressed MP3 file to the midrange). Most record stations replaced those units as fast as possible. Personally I think, the audiophile world waited for them. Here is a version with an updated motor.
PRAT counts.
PRAT counts.