RE: In flight CA hinge failure...
The servo might be too small. Also, I only use 2-3 drops of thin CA per hinge side. Too much CA will stiffen the hinge and not allow proper flexing. Some people swear at them, some sweat by them. I've used CA hinges for over 20 years on everything from sport to trainers to pylon racers to giant scale. Never had an in-flight failure.
Dr.1