Although mine remains to be built, I've always wondered about that particular issue. Joining a wing this size with what amounts to a thin plywood brace is perhaps not enough.

However, I suspect that your brace Jolly might have not been fully bonded (back, front and ends) to the wing panels as it appears that the piece came detached in flight locating the load onto the root rib joint. The bond is actually tricky to acomplish since the insertion of the brace essentially removes much of the adhesive.

My inclination would probably be to peel back the covering around the center joint, join the wing as directed and then glass the entire root area with two layers of glass cloth (6 oz followed by 2 oz) in increasing widths. The strength of this joint would be considerably higher and would distribute the stresses over the entire glassed surface as opposed to concentrating it on the brace joiner. I'd go 4" wide with the 6 oz cloth followed by 8" wide with 2 oz cloth (the edge of the fuse sides + 1").

Of course, all the other models in this series used plug-in wings. Aside from the "surfboard" wing syndrome of the CAP, perhaps the above is one reason to have gone toward alum/CF tubes and wing panels on the later designs.

David.