So I've got a 2004 Am. Deluxe Strat. When I bought it, it had been sitting in the back room of a store for 10 years. The truss rod had seized and, in my foolishness, I ended up stripping the hex socket trying to adjust it. I ended up getting the relief reasonable, and left it there. Last night, years later, I was playing it and heard a weird rattle/buzz. I narrowed it down to the headstock end of the neck - I hear a rattle when I knock on the back of the neck with my hand. So I suspect the nut has broken off in there. However the nut seems to be solidly fixed when I prod it with a tool, so the break may be further down, or the end of the rod is just pushing it back against the plug. Anyone encountered something like this before? Is the neck f&*$ed, or can it be repaired?