danceskater
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It appears that in some kits the aft-most top and bottom flange holes are missing in the W-1009L/R ribs. Two holes in each of six ribs (per side). The inboard rib W-1008L/R is OK. We simply used the skin to match drill the missing holes and then dimpled them to match the rest of the flange holes.
The drawings show the holes but they are not actually in the ribs.
The drawings show the holes but they are not actually in the ribs.