AFT Starting stitch Wing leading edge fairing Capstrip Reinforcing tape (should be same width as the rib) Modifield seine knot Capstrip Reinforcing tape (should be same width as the rib) Single loop lacing S S S/2 S = Normal stitch spacing Pull to tighten Pull to tighten Load Load Knot completed Knot formed but not tightened Pull tight Push knot under fabric 1 2 3 4 3-20 Figure 3-28.  Hiding rib lacing knots below the fabric surface results  in a smooth surface. Figure 3-29.  The splice knot can be used to join two pieces of rib  lacing cord. Figure 3-27.  In this example of rib lacing, modified seine knots are used and shown above the fabric surface. Hidden modified seine  knots are common. They are made so that the knots are pushed or pulled below the fabric surface. Occasionally, lacing to just the rib cap is employed without  lacing entirely through the wing and incorporating the cap on  the opposite side. This is done where ribs are exceptionally  deep or where through lacing is not possible, such as in an  area where a fuel tank is installed. Changing to a needle with  a tighter radius facilitates threading the lacing cord in these  areas. Knotting procedures remain unchanged.