I have an older Forester model that was installed in our cabin likely in the mid 80's. It has very little use from the previous owners and is in excellent condition. However it does not draft. A local chimney/fireplace company said that it probably won't since it does not have a liner. The quote for the 13' liner alone was about $3500. We are considering just replacing this with a new unit and liner next year. They also said that the insert looked like it was sticking out too far from the chimney due to design of the fireplace... is this worth saving or should we just replace it next year?