#1
I was checking my intonation and it was a bit off and after fiddling around with it I think its pretty good now, all the notes at the 12th fret are within 10 cents of their notes, is this good enough? Should they be closer? Maybe 5 cents or something? At lest to my ears they sound pretty good...
#2
Within 10 cents should be okay if it sounds in tune to you. Equal temperament is out of tune anyway; so go by your ears, not the tuner, when it comes to fine-tuning.