Actually, I carry three with me for most appointments. And that doesn’t include many, many more tools at home. But one toolbag is typically all I need for a tuning. The extra materials are for those impossible-to-predict broken strings, regulation and voicing issues, broken parts, and miscellaneous repairs! And those extra toolboxes stay in the trunk.
So you know it’s a serious job when you have to bring in the second toolbox…
