You can shim a nut a little, or rebuild a slot as needed, some Erlewine trick, baking soda and super glue?
Bone nuts are easily available, but you really need a good set of nut files to do it right.
I finally bought this set of Japan made files 010 thru .056, money was never better spent. Thats the '73 D35 getting dialed properly at the nut.
It's too bad somebody goofed with this nut and over-lowered it, but 99% of guitars are too high at the nut slots, wreaking having with intonation through the first three frets. It becomes easier to understand why so many stars don't play up there but capo, eliminating the nut altogether.
I suffered through many a guitar with too high a nut over the years. I have really sensitive ears to pitch inconsistencies, a guitar just won't ring right, or, you have to slack the EB strings for a good ring playing in D & G, but then a hair too flat for a good E Major. It gets old.
I'm still evolving at understanding intonation, waves, standing waves.
Frank Ford has a nice write up on setting nut slot height optimally, press at the third fret, measure at the first with a feeler gauge, which I pretty much refuse to do. I would rather eyeball it and feel the bounce, but it's just a very slight gap. I'd say most guitars are too high in the nut slots by about .010".
The real reason I'm doing this to strings anymore is I'm just tired of stabbing incident when dusting the headstock or changing strings.
