I worked on attaching the gussets to the aft wing ribs #1-4. First, I needed to modify the end of aft right rib #1. Apparently, this rib needs to be shorter so it is trimmed and a small angle is attached to act as the flange that gets rivetted to the rear spar. I used a 5/32" drill as a spacer to get the exact set-back needed from the existing flange so that I knew where to attach the new angle/flange before trimming 1/4" off the back of the rib. I got the rest of the gussets/ribs drilled to #40.
Using a 5/32" drill as a guide to set the proper set-back.
