This one is the same as Project 1 except with AN427AD4-5 rivets(countersunk heads) instead of AN470AD4-5 rivets(universal heads). Again I drilled out 25 of those rivets and replaced them with AN427AD5-5, note the upper right corner of the manufactured end picture. I had one nasty drill start on this piece and several rivet heads need to be shaved for aerodynamics sake.
This is the manufactured end side of the piece.
The shop(or upset) head side. The larger rivets are in the upper left corner in this view.