Much to my chagrin, I have been using my CD tweak about every other week for several years now.
At the same time I run track 7 about 2 or 3 times I am also spaying my cables and wiping my components with an anti static spray. A bottle about 4 times bigger then the rip off nordost stuff and only $8 and not $38. Another audio tweak rip off from nordost this time.
I have never done a close a/b before and after this geek attempt to make my system better, but It always seems more relaxed and airy afterwards.
I will do an a/b next time.