Installed root rib assemblies. Also I realized that it woudl be easier to drill the 1/4-inch match spar holes now versus when I have the both wings completed. It would have been easier to do it before installing any ribs, but now is better than later.
I used piano wire for the hinges to fit in the machined holes in the pre-made spars, They worked great for alignement. I clamped in place and drilled the holes.
Also installed AN3-7A bolts on lower inboard side of main spar. I missed that on the drawings, but it was no problem doing it now.
