Hello all, I own a Peavey Milestone BXP 5 string. I realize that it isn't a very high end bass but I have an issue. Recently, I've noticed that: 1) I have a dead spot which is roughly centered around the 7th fret of the G string And after changing strings to Dean Markley medium-light round wounds: 2) The D string octave harmonic diminishes very quickly compared to the other strings. I don't remember what the open string sustain is like. I understand that the dead spot on the neck is somewhat typical and fixed by using a weight like a fat-finger somewhere on the headstock (are there any other ways to fix this). But what about the D string? Is there anything structural on the bass I should check? Thanks in advance.