Does anyone else have a compulsion about their frets being as in tune as possible? I'm thinking this is a carry over from my primary instrument. Also related, I can't get the 12th fret on my A string to move up to being in tune (it's consistently 109.4-6 Hhz instead of 110.0 Hz). It looks like the screw on the saddle is about to fall out, but it won't change the pitch. Any advice for solving the issue? Thanks.