Quote Originally Posted by dingobass View Post
Easiest way is to remove the nut, clean up the slot and then sand the bottom of the nut.
A few swipes on the sandpaper, then check the action height.
Repeat until you have the desired action height.
Without the correct tools and experience, deepening slots can lead to problems....
Spot on DB. Easier to start again on another nut if you stuff things up but not so easy if the slot gets too deep on the fret board as it is too hard to add wood and shims. Acknowledge that a small amount of sanding/tidying up is usually required but have found most replacement pre slotted nuts to be about the same height so digging any deeper may end up in tears if not too careful.