When I had a CA hinge failure it was becasue of the hinges being off a little or maybe the elevator was a little crooked and all of the outside hinges broke in same manor as yall are discussing. When I get hinge line perfectly straight, guess what, No failure since..... Just make sur ehat you aren't putting the hinge in a bind and it should be ok. Oh yeah use the elec hinge tool, creates perfect holes for ya.