I saw in an old post (like '07) you said truss rod repairs were relatively easy and you had done quite a few yourself over the years. I have a 2014 gibson LP classic custom and the truss inexplicably started rattling last night. I have dropped it back off at my luthier who did a set up on it about a week ago. He normally does very good work, I have never had an issue with him nor has anyone I know. What would you suggest doing? I don't think it is loose as he would have caught that during the setup. Sincerely, Sam