This is my first post on this forum, so please bear with me if this topic has been beat to death. I want to how to go about serrating the rear portion of the edge of a plain edge knife to produce a combo edge. I have several knives with both plain and combo edges, but a few plain edge knives in my stable would serve me better if they had a partially serrated blade. Does anyone offer this service, or would I have to do it myself? If I am on my own, does anyone have any suggestions about how to go about doing this, like what tools to use, etc?