On a kit this size, I would probably start over. It looks like those joints would have to be butt glued, and that's about the weakest joint there is. You could wrap the joint with fiberglass or maybe CF, but you'd never get it a strong as new wood. For a very small plane gluing the joint may be OK, but for a 1:4 scale plane I'd start over.
Last edited by flyboy2610; 11-25-2017 at 05:13 PM.
Reason: Needed it.