In this session, I arranged all of the left wing ribs into their correct positions and temporarily clecoed them into place on the main spar. This allowed me to final drill the bolt holes that secure many of them into position. Then I labelled all of these ribs with numbers, and then removed them off of the spar. Unfortunately, while assembling the ribs together this allowed me to discover that the one outermost rib needs to be replaced. That rib has the trailing flange that you're intentionally supposed to cut off, but I unfortunately modified a W-1011-R instead of a W-1012-R. Although I still have the W-1012-R rib that I was supposed to use, I now need to order a replacement W-1011-R for eventually completing the right wing. What's next? I now need to use a step drill to enlarge the holes in these ribs for snap bushings, which will later be used to run electrical wires through