Finished deburring remaining stiffeners and match-drilled to E-901R Skin. Removed all stiffeners & marked all positions. Cut out remaining stiffeners for left elevator: filed and deburred edges and polished on scothbrite wheel. Filed, deburred and polished E-615PP reinforcing bracket. Fluted and alligned E-903 and E-904 counterbalance ribs for left and right elevators.
