My brother suggested I take a breadth and test a couple things.
1) see if I'm drilling perpendicular to the skin by putting in a rivet in the longeron and see if it is flat. Photo one looks fairly flat. But some had a small gap which will close when squeezed.
2) Measure if longerons are flat at the elbows. I put a level across the longerons in between the 705 and 704 bulkheads about where your elbows go. They look flat. I could imagine a slight twist in the left one, but it appears flat enough, I think.
3) I checked to see if my mid-fuselage bottom skin holes were still lined up with the 704 Wing Bulkhead. And yes they are as shown by the vertical punch slid into one of the holes.