The bell doesn't seem to be designed to move above its attachment point. It seems as though it was meant to be a way to make sure your rifle was kept vertical. I.e, see light on both sides of the bell. I could be completely wrong though. The bell is simply attached to the anvil via a very thin wire--it just swings in that channel. The idea of the 'boar spear' is fascinating. I have never considered that but it makes perfect sense.
I have lurked in this forum for years, but never posted before and boy am I glad I have started. What a great group of people. Thank you again for your input.