At 600 RPMs, it's just like a Big Ole Grandfather Clock, more of a Melody than noise.
Compare Judy Garland's voice to that of Susan Esterich.
I sell a CD with this article included, numerous pictures, info on making specialty tools, how to inspect and determine quality, how to prepare a common Listeroid for hard work.
Setting up cooling systems, and a bunch more including the utterpower manual for the ST gen head.
They are also works of mechanical art, and will keep a mechanically-minded hacker occupied for weeks, experimenting and tuning.