Took a break from the sheet metal brake and worked on bending the lower skin. The technique that seems to work is to clamp angles to one edge and work the sheet back and forth (per plans) Eventually you work the metal far enough to where the clamps fold all the way back and touch the sheet metal. You then lay a piece of plywood on the inside of the skin to protect it. In the meantime, you need to lay a piece of wood (I used a 2 x 6 x 8) in the fold of the skin and apply significant downward pressure while working the metal back and forth. Eventually I kneeled on the 2x6 while working it back and forth (I weigh 170 lbs and that seemed just about right)
