I recently built my own guitar from a cigar box. I realized that this would cause an intonation problem. I had no idea, though that my harmonics would all be one fret early for some reason ( 11th, 6th, etc.). Can anyone help me correct this problem? I searched but couldn't find anyone with a similar problem. Any information would be helpful. Thanks.
sounds to me like your fret distances don't match your scale length. measure the distance from the nut to the 12th fret, and then the distance from the 12th to the saddles/bridge, and if these numbers dont match, you'll need to move the bridge so it does.