I saw the results of someone, actually a police officer, who changed the barrel of his Model 29. He clamped the frame in a vice and unscrewed the barrel with a pipe wrench. Then he screwed in the replacement barrel with the pipe wrench. He said it was just like changing a light bulb. Since it was just a shooter, he told me he didn't mind the teeth marks on the barrel from the pipe wrench. I still can't believe he was that stupid. Until the day that I die, I will never forget this stupid butchery of a fine revolver.