NEED HELP PLZ
i hav a washburn N4 (Nuno bettencourt model) guitar
there's a problem with the tuning lock at the nut for 5th and 6th string .
i cant lock(tighten) the screw.its moving and moving but not getting locked.
but the other two are ok,they r getting locked perfectly.i can lock the screw when there's only 6th string is present (5th string is not stringed)
and when both 5th and 6th strings are absent,but cant lock the screw when both strings are stringed.
i hav tried with other screws also .but all the same