I purchased a Strad copy for a really good price off of my friend who is going to college and not going into music. He didn't play it much. Now that I've been playing the bass a while i notice that the G and A string nut slots are actually digging into the fingerboard causing buzzing (this is probably a result of tuning over time, i think). My budget just hit under zero, so going to a luthier is out of the question. Any suggestions? What can I do?