Tuning these guitars can be pretty frustrating. I have owned several guitars with Floyds. Keep in mind that when you tune one string, the others are going to go out of tune. I always tuned to about a half step lower than standard to allow the strings to adjust to the tension. Then tune them almost to pitch, then tighten the nut, this will raise the pitch slightly, then tune to pitch using the fine tuners at the bridge. Sometimes you may need to loosen the nut and start over again, but after you get the hang of it, it's a piece of cake.