I know my fellow siders out there have done this once. One guy on my crew hit a freon line and a gas line hours apart. I keep telling these guys make sure u find the center of the stud. A lot of times some of these old houses the studs are not 16 on center. Would u dare to repair the line yourself of have a company fix it for you. When it comes to freon lines I can't service the system so yea have someone else do it. On the gas lines all the tech does is flare the lines and put a coulper in. Sounds and looks easy enough but would you do it?