The picture below I added blocks for the wing hold down screws. Also note the small peices of shaped balsa at each hinge area. The trailing edges are not enough wood to hold a CA hinge let alone a Robart pin hinge. This will give the hinge more bite,. It's lite, cheap insurance and built to last. I use thin CA on all the joints followed by two coats of Medium and i'll finish the other side and glue up with 30 minute epoxy tonight, clamping the halfs together.