I've had my Summit for 2 burning seasons now. Just recently noticed that the pin the used to be at the back center of the firebox is gone. I think it did something like link the top baffle with the back metal post but not really sure. I guess it feel out out some point and I scooped it up with the ash. Anyway does anyone have info on what this pin does or if I need it? I have no idea how long i've been burning with out it.