^^^what he said ...it's easy and you will know if the neck is the problem if it is still out of wack......compare the fretted 12th and harmonic 12th on each string....if they are not the same adjust the saddle in your bridge forward or back to get the pitch identical.....if the fretted note is higher than the harmonic, the string should be lengthened by moving the saddle toward the tailpiece....if the fretted note is lower than the harmonic, the string length should be decreased by moving the saddle towards your pickups :D