Rib 4 (almost) completed
The "frame" of Rib 4 is completed!
I once again had to bend that inside flange out of the way :(
Here it is with the extra bits attached:
One problem I'm noticing on this rib, and also rib 5 now that I went back and checked, is that the bending of that inside flange created a curvature in the top part of the rib, as you'd expect, really:
I expect a bit of fluting along that same inside flange should fix this ... I'll give that a try next.