Just bought a D800 + DR-5 angle finder and can't seem to screw the angle finder on correctly. It keeps turning 90' too far to the right (see pic). Does this mean that the silver thread part on the DR-5 has been turned too far? I can still use the angle finder but it should be up right, not pointing to the right. Do I have to loosen (don't know if that's even possible) the black rings on the inside of the silver thread in order to turn the silver thread back into the correct position? Has anyone ever seen this before?