Hi there. I've got a '75 Precision Bass that's got a persistent buzzing at the 12 fret for the A and E strings. I like my action low. I can eliminate the buzz by raising those two strings, but then I have issues with the playability. The action doesn't have to get deadly high, but I'd just like it lower. This bass has a maple neck and its original frets. Any ideas what I can do here to eliminate the buzzing and get the action nice and low? Thanks for any thoughts.