Hi, I have three early CD players at the moment: - Philips CD100 and CD300 - Marantz CD73 I recaped the CD100, and did the power supplies of the other two. What It's like to know is how I can check and adjust the laser current on all three. Are there tutorials for this ? So far they play but are extremely sensible to the tiniest vibration. Moreover the CD300 and CD73 won't always load the CD straight, so something must be weak somewhere. Any hints appreciated. Thanks !