Clecoed 3 reinforcement plates, bottom rib, rudder horn and a shim. Final drilled #30 all 1/8 holes common to the parts clecoed. Separated all the parts, marked reinforment plates with top with will be the vissible side. Deburred reinforcemet plates. Radiused the corners of the R-912 counterbalance rib and R-903 Top Rib flanges. Fluted flanges.1 flute on R-912 made it straight, R-903 took more work.
