I fabricated the tools required to roll the mid-fuselage skins exactly as described in the shop manual. I used a tablesaw to cut the 45 degree bevels on the edges of the 2x4 shown in the picture below. The aluminum clamps were made from 3/4x3/4x1/8 aluminum angle. The tapered ends were cut on a bandsaw. A couple carpenter clamps, three C clamps, and two Vise-Grip tools completed the set.