Piece of cake.

First, the crack in the rib ib picture 3 you can just glue - nothing fancy, just glue it. Thin CA will wick right in, or you can spread it like you''re doing in the picture and put a little medium CA or wood glue in it.

For the front of the rib, get a piece of balsa scrap and glue it along side the rib. Then sand it to shape. It won''t matter that it''s a fraction of an ince to one side or the other.

To re-do the sheeting, have a look at this:

[link=http://www.rcuniverse.com/magazine/article_display.cfm?article_id=98]Sheeting repair[/link]