AeroWorks Sport Cub S2 ARF-QB Assembly Manual page 80

5. Gather four 8-32 wing mounting bolts and four
#8 rubber backed washers for preparation of
mounting the wings.
6. Slide the rubber backed washers on the wing
mounting bolts and insert bolts through the fuse
side and into the wing root blind nuts. Tighten
snugly but do not over tighten and crack the fuse
or wing root wood.
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