Just bought a nice used squire precision 5 string. neck needs adjustment. Would like to install the best truss rod nut possible. My last attempt on my 4 string squire powdered the nut. It must have been made of soft aluminum. Could somebody give me a clue on the replacement. I don't know if it has R or L threads. Will the new one start easy? It seems to be close against the neck now. Also, 4th string buzzes open and 1st and 2nd frets. Any guidance would be greatly appreciated.