I hope this is in the right place. It has been a good long while since I setup a bass from scratch and I am having an issue with intonation. This may be something common, not sure. Currently the tone is spot on at the 12th fret on the E string but at the 3rd fret it is about 4 cents high and at the 17th fret it is about 4 cents low. The more I lengthen the string at the bride the further these go out. What am I doing wrong? I'm sure it is something simple I just don't know what it is.