Hello experienced TB'ers, I'm trying to file down the nut on my DB and I'm looking for the proper size files. The strings I'm using are: D'Addario Helicore Pizzicatos, 3/4 Scale, Medium Tension E-68.0 A-67.0 D-66.0 G-62.0 (I don't know how to go about getting the size or sort of file I'm supposed to be lookin for) The reason for the job is my high action. It's tough to play, and I could fit several business cards under the first note position without them holding. Should I take off the glued-in nut and file the bottom flat? Thanks in advance, and any advice for going about this would be greatly appreciated.