So i did tune my esp ltd deluxe H-1001 down to D-standard and putted on d'dario 11-56 gauge strings. The strings where to big for the string nut so i used a nail file to get it to the right size for the strings. Unfortonately i did cut it waaay to much, and now the guitar goes out of tune all the time (i even have esp locking tuners). Does anybody know how to fix it? I've heard of glueing it, but i think it may make it even worse. Do you guys know where they sell black string nuts for this string gauge?
The nut was filed wrong. Either read up on what a nut actually does or take it in to get replaced.The information is not hard to find with a little effort.