I've yet to understand the appeal of a rack mounted tuner. Why would anyone want to lug around that much more hardware? How often do you really need to reference it? So the next logical step is a pedal tuner. I don't really have a pedal board so that would be more crap to tote and power. Granted, my guitarist has one on his pedal board and he uses it quite a bit, but he does some extreme whammy excursions. I use a Snark clip-on tuner that takes up next to no space in my gig bag pouch. I tune before a gig and throw it back in the bag. My bass is usually still in perfect tune at the next rehearsal, and the one after that. Are other people's basses unable to stay in tune and require constant tweaking?