Ok, let's back up a little...

On the aileron, you have a CA hinge.

On the tail, you have pinned hinges. Do not use thin CA on these. Put a drop of oil on the pin, then pull the hinge out and smear some epoxy on it and reinsert it. Then wipe excess epoxy away with alcohol.

You're right, the pin method I showed above should be done on both sides, but it will only work with CA hinges, the nylon hinges are too thick to push a pin through. What you CAN do (If you want the added insurance) is to drill a hole through it and insert a round toothpick, and glue it in place.