I still think that you could reduce some analogue noise by building a modified laserdisc player, that has a high mass turntable, like those you find on audiophile record players.
The heavy turntable would act as a flywheel smoothing out any cogging from the drive motor. Thus removing any changes in linear speed, and the effective noise this would induce in the playback. This would make the playback of the disc far more consistent from one capture to the next.