My 2001 lp custom has had tuning issues with a creaking nut on g string. I filed slots smoother, and lubed with no real improvement. I installed a black graphite nut and no more issues with nut grabbing. The smooth molded string grooves are 10x smoother than a factory nut will ever be. Does not look stock with black nut but stays in tune for more than 3 seconds, lol. Intonation has improved as has the tone. Finally this LP is useable for big bends with alot of vibrato. The best $6 I spent on gear.