my mexican fender squire bass is driving me crazy. i set up the intonation fine. The open E and 12th fret E are perfectly to pitch. But... the notes in between get progressively sharper as you go down from the 12th fret.. like.. 11th fret is darn close 10th fret is a little off by the time you get to the 5th fret, 3rd, and 1st fret, it's way way sharp. Is it just a matter of the bass being a POS that's built horribly? i'm wondering if there's anything i can do about it.. perhaps move the bridge forward or backward or something. What do you think it is?