Ok i have a Oscer Schimdt OB50 by washburn. The string buzz so freaken bad and trust me my intonation isn't the problem because it does it when it's open and i could press on the string as hard as i wanted to and break my finger but it still buzzes. I don't know if it would be the truss rod or if it has somthing to do with the tuning keys. I tune from drop A to standard and everything in between and i don't know if that could also be doing it. Also while i'm hear would this affect my string to where the condition is they break talking about if my tuning keys are the problem. Because when i tune my bass up to say drop D after it's been in drop A as i tune it to those notes the tuning keys want to get tighter and on my FenderP bass the tuning keys don't do that so i have a feeling that the problem could be infact my tuning keys. Also my FenderP bass string don't buzz like they are with my Washburn OB50. If you guys have any suggestions please tell my how much it would cost for you to go and get that repaired. thanx