Re: Need some help IDing this KM
The KM rattle refers to how the tray sits loosely and will rattle around on some old models with a really big draw.
In all my time I have not heard about any included piece of metal inside the stem and mine does not have such a thing. I am going to check my KM when I get home from VA and make sure I didn't just miss something over the entire time I have been handling that particular hookah.
Also that seems to be near the top of the stem that he is getting the rattle.