Finished drilling the right F-876 aft cabin side cover. Installed platenuts in the cockpit sides and the right-aft floorboard. Marked, trimmed, fit, and drilled the left F-876 as above. Installed platenuts in the cockpit sides and the left-aft floorboard. Primed both aft cabin side covers. Drilled and clecoed the rear seat mounting hinges on the floorboards. (Note: Drawing 29 shows the left floor-mounted hinge with the eyes at the end of the hinge segment, and the right one with the eyes opposite. Unfortunately, Drawing 32 shows both hinges on the seat having their eyes at the ends. Try assembling that...!)