i own a 1996 stingray that has a flat, thinner neck and fingerboard and a 1.75" nut. I have a 2006 USA Sub bass witha baseball bat thick neck, rouder radius and a 1.75" nut. Just took in on trade a more recent Stingray (waiting on date from EBMM forum) that has a neck wider than the 1996, and thinner than the 2006, but with a 1.65" nut. Why all ther variations? What year did MM switch nut size on Stingrays?