Worked on root rib attachment angles. Aligned and then drilled a couple of holes. I had to unbolt that rear attach angle becuase it was bolted as part of the rear spar assembly. However, I wanted to ensure that the root rib, with the attachment angles were the correct lenght, so I allowed the root rib to foat between the fore and aft attach angles until it was located properly, then I clamped it in place, then drilled a few holes and clecoed in place. Worked very well.
