Next I crimped the inboard edge to get the shape of the trimmed rear wing skin. Once the shape is close in both axis, mark the tangent line and line that up to the trim edge. I split the L angle at the main spar and worked a front and rear L angles separately. Line up the tangent line, clamp in place, drill from the back side, deburr, and insert one cleco at a time. I started in the center and worked out towards the ends.