Completed drilling the F-776 skin to the skeleton. Kept up the convention of marking each row as I completed drilling by adding a "2" to the marks from the first round of drilling.
Began fluting the F-715 ribs to match the curve of the fuselage sides. Used the technique seen on VAF website to use the holes on the opposite side to check the curve, instead of installing and removing the rib to check it. This worked very well and the ribs fit the first time I installed them.