As I mentioned yesterday, the aft portion of the wing root fairing is the most difficult to make. One challenge is that the must intersect the fabric, which isn’t on the airplane yet. I used contact paper to simulate the fabric:
This allowed me to mark and trim the inboard side of that fairing and drill it to match the wing root. After a short lunch break I came back and got most of the right wing root fairings done, and welded more on the exhaust pipes.