#1
Ive started to notice my Ibanez is going out of tune on the high e string. For example, if I play a natural harmonic at the 24th fret, the fretted note at the 24th fret is sharper in pitch.
So as I go up the neck, the note gets sharper in pitch than it should.

So when I go to intonate my guitar, would I move the saddle closer to the neck, or farther away from the neck? And how sensitive is it? Should a few mm do the trick?
#2
You want to test it from the 12th preferrably.

But you move it one way, if it worsens it, move it another.
#3
It's not very sensitive for me. For my guitar I have to turn the screwdriver multiple times. I also have an ibanez.