with a screw driver.


it depends on your preference. most people prefer low action. the action depends on how well your neck is set.


you cant get better tune. you can tune your guitar, with a tuner. or do you mean intonation?

if u meant intonation, then:
1. tune your guitar
2. by checking on the 12 fret, adjust saddles.
a. its its sharp, move the saddle away from the neck
b. if its flat, move closer to the neck.