That was my thoughts re the thumb rest too. Good price though  I have just spent around 3 months tinkering with my BB714 to get the action right. Initially thought there was a bow in the neck but there is more than enough movement in the truss rod to rectify that aspect so, put a shim across the two screws closest the neck pocket heel to change the geometry and have to add, worked a treat after all the tinkering was done.