Many have the same curiousity but it would seem the topic has gone dead. I highlighted the same area as my concern previously and we've heard no info posted on the other thread to poll this info. With little feedback from those who have had critical failures its hard to say. Though a bit of a head ache I did the following.

Aluminum Spar wrapped in Carbon fibre (Hard Ply would do)
Mixed 1/32 Milled fiber into the epoxy to join wing halves
Added Carbon Fibre shafts (Arrow Shafts) thru the Balsa block portion of the wing Cord, Fore and aft of the spar
3 oz Kevlar ~ 6" wide(Fibre Glass would have done just as well) to wrap the joint
A strip of Kevlar 2" wide from the left to the right flap servo bays along the spar
Poured a generous amount of Milled Fibre/Epoxy to fill the gaps I found at the spar toward the root just past the Flap Servo bay.
Glassed the wing surface with 2 oz fiber glass to where the Flap and Aileron meet.


I weighed the wing before starting and after and found I've added 5 oz in the process. It did take a bit of work laying up, layering, sanding etc.
I figure if I crash for what ever reason, it will likely be the only section that survives.


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MAX