Brief Description: Marked center lines on all ribs
When I finally found shortie rib W625, I fluted it as well. Then, I took a red sharpie and marked the center of the flanges on all the main, leading edge, and tank ribs. EAA had a great tip on easily marking the center of your rib flanges. It worked well. More later. The idea here is to have a highly visible line available to show up through wing skin pre-drilled holes as you position each rib onto the spar for permanent mounting. While a little slow, that step was a snap.
