To those that recommend epoxying the wing halves together, consider this. The strength of the wing is in the spar. The joiner pin between the wings is what keeps the center joint aligned and transfers stresses between the wing halves. If you look at many of the 3D and aerobatic planes, the wings are held laterally (into the fuselage) with very small screws, or even rubber bands. There is not a lot of stress trying to separate the wing halves from each other. Consequently, epoxying the wing halves together, while making a stronger joint, is contributing very little. If you have a metal rod that runs between the wing halves, there is no need to epoxy the halves together.

Brad