Thanks much, Copper. I had no idea an overhaul cost so much. When a GA (I had to look it up) aircraft flies overhead, they don't sound like a Porsche revved up. Matter of fact, there are some that sound like they are turning rather low rpm's. Wow, $25 grand. And I would suppose the old aircraft don't have the features (quieter inside the cabin, heat and a/c, etc) or aerodynamic performance of a new aircraft. I don't recall ever hearing a GA plane overhead with a rough-running engine. I guess I now know why!