Just made a few updates on the procedure for installing the CD gear. At one point I mentioned possibly needing a shim for the lens motor on a very small amount of drives. Turns out that simply flipping the lens motor over fixes the issue on most. Must be that the spindle is not perfectly centered on some motors or possibly that the mounting is warped.
Also, grease definitely seems to help with the lens moving too fast issue that happens with some drives. However, most drives don't need it since the motor usually gets weak with age naturally making it a bit slower.