
Originally Posted by
Simon Barden
Always best to leave it a while after any truss rod change. And you'll probably want a small gap there. Unless the frets are very well levelled indeed, you'll never get it buzz-free without a small amount of neck relief. Too much neck-relief and you'll need to lower the bridge to get a decent action on the lower frets - but this means that the strings will probably be too low on the higher frets - causing buzzing and/or choking out when string bending. It's always a fine balancing act.
Once you've found the best buzz-free compromise, then you can look at lowering the nut slots if there's a noticeable gap between the strings and the 1st fret. If not, leave well alone, but if there is, then you will want to file down the slots to lower the string height. Too high a nut slot can make fretting on the low frets quite hard, and the extra amount you have to stretch the strings to touch the frets can affect intonation and make those notes sound sharp. Plus lower slots also means a lower action when the strings are un-fretted. But it is easy to go too far when doing this, so go very gently, just a few strokes at a time. And it's best to use a thin feeler gauge between the string and the 1st fret to help you from taking it too low.