I received my .44 Dragoon on the 15th and decided to convert it to .45 Long Colt centerfire. The Kirst cylinder was ordered last Sunday and was at my door on Wednesday. The fit and finish was perfect, a VERY high quality accessory indeed. No timing or fitment issues, only a loading gate cut had to be made in the frame. I used a 1/2 carbide grinding bit in an air drill, about 30 minutes of careful work. Then about an hour of progressively finer sandpaper until the metal surface matched the outer frame. A good swirling of cold blue and a excellent blend-in on the finish. I'm very happy with the result.... I reload for my Vaqueros and this Cowboy Action loading (1000 FPS) or less is required using this conversion.