Riveted the flap bracket assys together. Riveting the assys, inboard and outboard ribs, and the inboard reinfocing bracketry to the flap spars.
Made a absolute botch of the middle rivet on the outboard end of the left flap. When I drilled it out, had a perfect "figure 8" hole. (!!!) Enlarged hole to 0.204" with #6 reamer, and will use one of the extra 1/64" oversize bolts + nutplate as the repair.