So tonight during my cook, when the lid was open I noticed that the pin (not sure that is the technical term) that goes into the rod of the cap to make sure you don't loosen it too much was missing. I removed the grates and looked in the firebox but I couldn't find it. Does anyone know the correct term and sizeof the pin and if i can just grab one from home depot? I'd hate to unscrew the cap too much, that thing is a beast!