A very close friend of mine manufactures CD's and travels internationally setting up other companies CD production. When I told him how great the "green ink" markers were, he told me I was nuts. After much discussion, we took two identical CD's, marked one with the "green ink" and left the other alone. Upon doing an A-B comparison, I came to the (grim) realization that the only benifit of the green ink was to the manufacturers and retailiers that sold it! All of my (former) precieved perceptions were there because I WANTED the green ink to work. The fact is it does not. The whole reason for bringing this up, is that the ONLY why for you to really know if any of the "tweaks" work is to do your own BLIND TEST. Listen to your ears, not to what your eyes have read! Two last thoughts: In theory, sanding the interior hub of a CD may reduce slight burrs (if any), while too much could widen the opening too much - be carefull. The second is an article I just read (my friend the CD manufacturer e-mailed it to me) that you may find enjoyable: http://www.emedialive.com/em2000/standard9.html
CD other tweaks
Over the week-end, I had the chance to try an audio tweak.. sanding the outside rim of a CD, the impact was great. I have tried the paint route and had some success..but I had heard about using very fine grit sandpaper on the outside rim of a CD. I tried it and it was up there with major component changes. The most hear-able differences were: a more quiet or "blacker" silence between notes..and a sense or more detail..but more ease at the same time. Has anyone else tried this?