Continued working on the 16.5 Ribs. Holes were cut and flanged, and stiffeners were added. Stiffeners on the left side are more substantial as needed to support the wing walk area. A full chord template was made to ensure that the rib section was installed accurately even though the primary reference for this is the chord line. The BL:36.5 rib was installed after removing the outboard main and aft spar. These two ribs need to be installed so that the contour of the side skin can later be established
