I got my made in China G-310 real cheap a couple years ago with the intention of being able to use it to learn to work on and hopefully to end up with a playable guitar. I've changed pickups, pots, nut, learned to adjust the truss rod and intonation, and now I've changed the tuners. I removed one of the original tuners and compared its measurements with the specs of tuners listed on the stewmac.com website and found a set of 18:1 Grover locking tuners with the same measurements. And yes, they fit perfectly without having to drill new holes. Yay!! The difference is night and day, chalk and cheese. The old tuners were supposedly 14:1 but they were loose and sloppy. The new Grover tuners are sooooo nice, and it stays in tune so much better. And the education really feels nice.