I just got a great Yamaha TRB5-II bass (http://www.talkbass.com/forum/showthread.php?t=687561) The only issue is that the center click on the knobs is almost gone - you can hardly feel it. The temporary solution was to put on some small stripes of white tape and small 'dots', so I got a visual representation of the knob's positions. It seems like I can't just swop the pots as they are integrated on the preamp's printboard... So, does any of you have an idea whether the posts can simply be cleaned up in some way to regain a center click that you can actually feel properly? I am a technical imbecile, so I don't even know how to get the print board out of the bass, but I guess that's possible somehow... Well, any kind of feedback is welcome, and it is not crucial for me to get it fixed as the tape solution works out OK, but it would be nice to have it fixed and remove the tape - it doesn't look that great.