If you're going to install Schaller GrandTune tuning machines, I suggest that you buy 3 sets per guitar because in my experience with them, one tuner per set will strip out within a year with no way to adjust them, and a year from now they'll no longer make the color you installed so you'll have to switch them all out if you want them to match. I gave up and put Gotoh tuners on everything. Much happier.