Lt. Bob wrote:yes this is right and here's why.
ALL the frets the entire length of the fretboard have that same amount of clearance ... any note you play is like that .... play the first fret and measure at the second ..... play the 6th fret and measure at the 7th ...... play the 14th fret and measure at the 15th ..... see what I'm saying?
So why should the clearance over the first fret be greater than all the other frets? It shouldn't.
Yes, right.
I didn't think/say there would be different clearances from fret to fret...
...I was just thinking about how Roman worded it, and it hit home how very low the grooves need to be to the fretboard.
I was asking for a number in millimeters because the overall clearance would be affected by choice of action height. I'm curious what Roman uses for his standard.
I wonder if there might be "some" differences (it's probably micrometers) that might be caused by the normal bow in the neck that is needed for proper action, relative to the position on the neck and the distance from nut/bridge to fret in use...?...,but yeah, even then, fret-next-to-fret measurements would probably be insignificant compared to a neck that was 100% flat from end to end.
I've never gotten that anal to measure all those points and compare...my feeler gauges don't go down that fine anyway!
I think a lot of manufactures when doing big production runs are simply using a one size nut, and just dropping it in there...so if the neck build is perfect, the height is perfect...but I think often when it's wrong, it's wrong on the high side, rather than low.