For CA hinges, you have to make sure the slots are deep enough and clear of any debris before you try to put the control surface on. I will usually dry fit the hinges several times before I glue them in place. If a hinge buckles when you try to press the surfaces together, don't even think about gluing it, take it apart and run an Xacto blade in the slot. Usually a little side to side motion will help wiggle the hinges into the slots. Once you have a tight fit between the surfaces, then hit it with thin CA.