Found this baby on Kijiji and I am really excited for it...pending playing and checking it over. Got it for 250 with hardcover case which I thought was a fair price. I am going to pick it up next week and will just be checking the electronics, finish, neck and knobs but I also want to check that the truss rod is fine too. Do you check truss rods before buying a used bass or is that overstepping the line of potential buyer? What size hex wrench is needed for that?