After dry fitting everything, I like to glue both sides of all the hinges at once, then flex the control surface to make sure nothing binds before letting the glue set up. It is easy to get a hinge not quite straight, and you want to find that before the glue sets.

For the CA type, a hobby shop will sell CA applicators, basically a small plastic pipette. Either trim back the covering around the slot slightly, or drill 1/8" down the center of the slot, and you should be able to get CA where it needs to be, and no where else.