Check each string at the 12th fret, harmonic to fretted note (make sure you are depressing the string evenly to the fret, not the fingerboard). If string height at nut is correct, recheck string height at 12th fret with strings open. 12th fret because it's 1/2 way to the saddle, so an action of adjustment of .010" will require .020" at the saddle. And that includes my own opinion. I run my personal guitars at .094" and .080" E to e. No fretting. Thank you. First step is to strum your open note on the low E string, then play it again at the 12th fret. Note: ... For locking tremolo systems, the individual string height is preset. Measure each string's height first at the 12th or 17th or last fret to see where you are at. Measurement for low and high E's should be the same as measurement taken at the 15th. The D-28 Authentic 1941 is by all accounts very comfortable to play. 2/32 is a good general guideline for the 12th or 17th fret string height readings. – Kanarat, Thailand Spoon Writes: Thank you Kanarat for this very good question. Pickups: Fret low E at 22nd fret and measure pickup height from underside of string to point on pickup closest to string. Then adjust and measure at each string again to see what you've done and to know where you are at. Clearance between top of fret and bottom of string. Telecaster® Adjustment And Care. How about the action at fret 12th of the sixth and first strings? Once the relief has been set, measurements for string height should be as follows: (measures top of fret to bottom of string): Bass side string height 1st fret: 1.5/64” Treble side string height 1st fret: 1/64” Bass-side string height at 12th fret: 2.5/32” Treble-side string height at 12th fret: 2/32" Guitar string height can vary within Martin factory specs. Use the two pivot adjustment screws to achieve the desired overall string height. If the note was sharp at the 12th, you will now use your screwdriver to make the string longer with the saddle. If the note at the 12th is sharp or flat, you will need to adjust the saddle of your bridge, loosen the string.