Cleaned up the spar slots for the left wing. Went back to the right wing's ribs and touched up some of their openings again. Glad I did. Three of the four spars have a slight bow to them which is not uncommon as long as the bow is along the major axis. Some of the ribs were pretty tight fitting and the bow made it more fun. Once the ribs were in place on the spars the bows have been minimized. When the drag/anti-drag wires are installed and tightened there will be no bows. I displaced the -11 and -12 ribs IAW the instructions to make room for the first of many spar doublers to be installed. My hands and forearms are smoked from wrestling the 24 ribs into position!