Formed the inboard stab ribs. It is important to note that there is a left and right rib. That is, they are not interchangable. Whether this was intentional on the drawings or not, I do not know, but the airfoil on the stab does have a right side up as drawn. Also note, flutes were not formed at very leading edge of ribs so that I will have room for stab-to-fuselage attach weldment at that location.
