Looking for input on the legitimacy of this '73 P-Bass. One thing that stands out is the thumb rest location. Did this person remove the PUP cover in order to move the thumb rest and use the same screw hole and is that something pretty standard? Does it decrease the value of the bass (read: was it modded?)? http://flint.craigslist.org/msg/3384836631.html Tried finding similar on google, but not much confidence there. Thanks, team.