Wot Doc sed.
If you don't have feeler guages, a bank card is a good substitute.
You can also use the Feeler Gauges to measure the amount of Relief, or forward-bow in the neck, to do this you put a capo on the neck between the nut and the first fret, next you fret the low E-string at the fret closest to the body of the guitar, then you use your feeler gauges to measure the gap between the bottom of the low E-string and the top of either the 8th or 9th fret, you want to have enough forward bow for a gap of .010 inch (for Fender style guitars), or .012 inch (for Gibson style guitars), if there's too small a gap loosen the truss rod a bit, if there's too big a gap tighten the truss rod a bit, check the neck relief for the high E-string too, it should be about the same as for the low E-string, if they are radically different your neck may be twisted.
You can use a small steel ruler to check the action at the 12th fret, or (as Fender sometimes specify) the 17th fret, I find it helpful to use a X10 magnifying Loupe, on Fender Guitars you want the 12th, or 17th fret action (that is, the gap between the underside of the string and the top of the fret) to be about 2.5mm (4/64ths of an inch in imperial) for all the strings.
to answer you other question Dingobass makes bone nuts and they are great, send him a PM when you are ready
Stan's LP Build for my Sister: http://www.buildyourownguitar.com.au...ead.php?t=3146
Benson Pickup Strat mod: http://www.buildyourownguitar.com.au...ead.php?t=5229
Epiphone LP headstock fix: http://www.buildyourownguitar.com.au...ead.php?t=3410
Martin Backpacker Repair: http://www.buildyourownguitar.com.au...?t=5038&page=3
'57 Harmony Jazz guitar project: http://www.buildyourownguitar.com.au...ead.php?t=2972
US Mint states that a Quarter Dollar is 1.75mm in thickness. I was surprised they quoted sizes in metric.
For those who want to use US coins as feeler gauges:
https://www.usmint.gov/about_the_min...specifications
Col.
I admit that I am an agent of Satan, however, my duties are largely ceremonial.
\m/