I bought a new mouthpiece, then went back through my collection to compare it to a few others. Have a listen, lemme know what you think...

7:09 Metal Dukoff KC Blues
7:38 Meyer KC Blues
8:08 Theo Wanne Earth KC Blues
8:37 Plastic Dukoff KC Blues
9:06 Metal Dukoff Smoke...Eyes
9:36 Meyer Smoke...Eyes
10:06 Theo Wanne Earth Smoke...Eyes
10:36 Plastic Dukoff Smoke...Eyes
11:07 Metal Dukoff That's All Right
11:32 Meyer That's All Right
11:55 Theo Wanne Earth That's All Right
12:19 Plastic Dukoff That's All Right
12:43 Conclusion