Having marked all the rivet holes in the antenna doublers I drilled them. I will set them in location and transfer the holes before opening the mounting holes to their finished sizes and countersinking the rivet holes. I radiused the corners with a one inch radius to keep the sharp corners from making stress points on the aircraft skin.
I then went on to secure the outer conduits under the floor area. The after thought though is I may have placed the forward adels too close to the spar bolts on the center section.....I may move the adels back a little further....the #19 holes will be little lightening holes...haha.