So I now have the shell off again, and there would appear to be two different clamps in close proximity to each other on the neck of the tube... one has the screw mounted horizontally, the other has the screw vertical, and theyre one behind the other... which is the one i need to undo or adjust? Also, if the tube hasnt been discharged, are these clamps to be considered live or are they outside of the realms of stored CRT voltage?