I completely redesigned the wing spar and center sections. The box spar center section from the original design was too wide and too thick. I simply cut it down a bit to fit through the body cut out. The original design had a complicated system of spars and ribs. I couldn't find any good instructions off the web so I just simplified the whole structure and made up box spars. Heavy cardstock from cereal boxes made sure the spars swept back at the proper angle. I also made up some heavy cardstock tabs to join the wings to the center section.
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