I am looking at my elevators and I have 6 open holes to attach the upper skins to the rear spars, at the outboard end of both elevators. These were left open on page 09-18 figure 2 and page 09-19 figure 3. The inboard 3 holes that were left open (09-18 figures 1 and 2) get riveted at page 09-21 step 4 for the left elevator and step 7 for the right elevator. I have completed page 09-22 and page 09-23 is where the trailing edges start getting closed up permanently. Am I missing a step or is the manual missing one?