So, wings and tail are done!
New technique!
I will add reference lines in the plans so that everything will be nice and straight!
First, its important that you really bend a nice curve in the foam. That will make it much easier for the ribs to hold the shape. Then apply glue to the top side of the ribs and glue them in one at a time. Allways check your angles and try to get them as equal as possible! Use the leading edge to line them up.
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Thats how it should look with the ribs installed:
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Then apply glue to the bottom of the ribs and glue the bottom plate on:
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And the wing is done! Allways double-check so that you dont get accidently wing warp.
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Next is the tail section and the fuselage!