Hi, I currently own a "king of hookah" brand "miss nile" hookah. It is a three hose, with autoseal valves on all hoses. I wish to convert it to a two hose hookah with a purge valve, but am having some trouble. I plan to completely take out the ball bearing, but there seems to be a metal guard in place, and no where to unscrew it. Has anyone ever attempted to do this with a similar hookah or valve?... and how would i go about removing this metal guard that keeps the ball bearing in place?