Use epoxy, not CA! Use 30 minute as suggested and leave it overnight to setup properly. I place a small weight on the left side of the wing to hold it flat against my freezer(put wax paper down on the freezer first) and make a small piece of balsa to hold the right side of the wing up to get the correct dihedral. In the morning turn the wing over. You will see a gap or 2 from the dihedral angle. Make another batch and fill this up with epoxy. then you will have a solid wing.