I have found that the urathane glue continues to seep out of the hole and you have to baby sit the stuff for about and hour. Once it starts to harden, water will not remove it. I use the same method but use Formula 560 canopy glue. It cleans up with water and holds very aggresively to the plastic hinges. If you doubt the strength, make up a test hinge and try to pull it apart. I also am sure to insert the hinge in the movable surface (either the aileron or elevator) all the way to the end of the knuckle. This puts the hinge pin approximately 1/16th into the elevator or aileron and places the rotation point behind the leading edge of the control surface. This eliminates binding when full deflection is desired.
I've used this method on 100" warbirds with 4.2 gas engines in the nose and have never had a hinge pull out. It's a lot easier than the urathane glue.
