Brief Description: Right Spar - Drilling J-Stiffeners and Spar Ext.
13-2: Step 7: Clamp J-Stiffeners and Spar extentions with 1/16 inch overlap as directed. I used a straight edge clamped in place to align the spar extention wing skin attachment holes with those on the two spar flanges. Step 8: Match drill J-Stiffeners with #40 bit. Marked and deburred both sets of J-Stiffeners for left and right wing.