Greetings!! I recently acquired a new Gibson Thunderbird Studio 5, witch came quite a bit off of intonation (the note in the 12th fret is almost 1/2 tone above the respective harmonic in the "G" string) =P Does anyone know how do I change intonation in this bridge (notice that it is different from the IV one). I'm asking this because I can't see any bolt or screw moving the saddle back and forward like any other bridge I've seen! I quite need some help, and pictures would be welcome!! Thanks in advance!! Cheers!!