I just used an emery board on my middle finger tip of my plucking hand. I assure you, no matter how twisted that last sentence may have sounded, it is completely innocent. OMG, that was just what the doctor ordered. My middle finger tip developed a callus that had a prominence that basically was catching the string causing timing issues (more than I usually have) and uneven play between my plucking fingers. Now that's fixed. Carry on.
