This may not be completely relevant, but,
Would using a lathe to improve the CD help clock accuracy or transport speed or jitter in any way ?
If the CD is not a perfect circle would this cause more vibration, leading to errors or jitter and laser focusing or whatever ?
I was wondering about PPB speed errors as I have noticed some CD's seem to have different PPB errors when used with the Genesis Digital Lense, IE one reading can be Zero error another 1 and another -4 etc, could this be caused by imperfect discs via print, weight or imperfect edges/circle ?
Some of the performance increases described remind me of what one hears with items like the Theta TLC and other jitter devices ?