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Next up was the task of making the boxing plates for each framerail. They wound up being about 50 inches long; Fatman recommends boxing at least 30 inches in front and 10 inches behind the rear axle centerline. I did this the same way I did the front of the frame (March '07 CT), clamping the 1/8-inch plate to the inside of the frame and scribing its shape into it, cutting it out, and trimming it to fit. Each side wound up being made out of three pieces I welded together before welding them to the frame to minimize warpage.