Hi i am from little old levin New Zealand
i am reading ever ones comments so interesting to read about whats under the plate on the headstock i am currently fixing up a customers guitar which happens to be a Ray Durant. I need to adjust the truss rod as the neck has a slight hump in it. I have tried ever Allen key we have available but just seems to be to small or to large. Is there a special allen key needed to do this. HELP!!!