I've made a few repairs, but it's still flying fine. Just know that it will crash hard if you let it. I haven't crashed lately (in the last 10 or so flights and landings), so that's good.

Broken wings and tail surfaces can be repaired with regular Epoxy (NO CA).

1. Remove any really lose pieces (but don't  really shorten it).
2. With Fine sand-paper, lightly sand the outer skin a little just in the area of the break (where epoxy will flow around the joint). This also works to fill-in a crease to re-strengthen it.
3. If it's a complete break, epoxy it back together in 2-3 steps (middle, top, bottom). Fill-in the crease or break until it's fairly level with the surface.
4. After it cures completely, apply a good heavy-duty clear packaging tape.

Early on, the wing broke in half so I reinforced it with a slightly longer and thicker piece of wood.

1. Carefully cut just the top spar-tape layer and remove the old thin wooden spar, and adhesive (so epoxy will stick).
2. With Fine sand-paper, lightly sand the outer skin a little just in the area underneath the spar (improves bond).
3. Paint the new spar (I used 1/8"x1/2"x24 Basswood) with thinned epoxy for strength. Can also be shaped and painted with epoxy paint.