Assembled the left flap skeleton and clamped the ribs to the skin to measure for shims. Made one .016 shim and two .024. The last rib fit nicely without a shim. Drilled the skin, shim and ribs #30.
Measured the hinge to 56" as indicated on plans and found the end would be right on a rivet hole, so I made the hinge 56 1/2". Marked the centerline and clamped it to the spar and drilled the hinge to the skin and spar, clecoing as I went. Drilled the rest of the lower skin to the ribs.
Disassembled and began deburring the skin and ribs.