Hello, we were cutting firewood earlier this week with our Husky 353. Ran into some nails in a piece of wood. One link is really mangled, not in the way that filing it would help much. Rather, it seems that the top part of the link isn't there anymore. I don't know if that is called the raker or the whatever, but a place with a curved edge that is sort of flat on top, that is missing a small part of its metal. Is it worthwhile to try to replace a link in a chain, or is that pointless and we should just buy another chain? Or we do we just sharpen/file the rest and go with the one bad link? It is an 18" bar if that factors in. Thanks for any advice. We have never done anything to our chain except sharpen it so not sure how complicated having a link replaced is.