I have an old Arrow wood stove and am having problems with the door falling off. The door flops down and the pins set in shaped metal pieces. Sometimes when my wife is closing it the pins lift out and it falls. Last night it banged her up pretty good. Is there a retaining clip to keep these in? I had one for 20 years and replaced it with the same model recently. It was in really good shape. When I installed the new/old one I did cut the hole in the floor for combustion air. What an AMAZING difference.