#1
So what material should I use and how much should I expect the job to cost, need this thing to stay tuned better, les paul studio. 
#2
If it's staying in tune better you want, some kind of graphite nut most likely (like TUSQ), but a #2 pencil will work just as well. It's best to get rid of the plastic nut anyway though. Personally, I would go with bone and a #2 pencil (I generally don't have to re-apply it until after 5 or so string changes).

As far as cost, I don't really know, but I would guess around $60 USD plus the cost of the nut ($15-$20 or less I would think).
"Practice doesn't make perfect. Perfect practice makes perfect." -some dude
#3
I agree with Prime. If you think it is just binding on the nut get a #2 pencil, shave off some graphite from the pencil and sprinkle it under the strings. I bought a small tube of powdered graphite at Home Depot or Lowe's (can't remember which) that is sold for use in door locks for about $5. I have had that tube for at least 10 years and there is still lots of it left in the tube after probably a hundred string changes (too many guitars). 


Yes I am guitarded also, nice to meet you.
Last edited by Rickholly74 at Apr 3, 2017,