I guess it's the 'installed properly' bit that I don't get. I use good quality CA, smear it evenly over the whole surface on both sides, and even clamp it afterwards when I can. Otherwise I use weights to squeeze it down.

Don't get me wrong - Most of the CA hinges that I have done have worked out fine. Just a couple that didn't, with disastrous results. One time, my whole 1 piece elevator came off in a high G pull out after a dive. It was thrashing around on the end of the pushrod until that let go and it went in. That was 6 CA hinges that all let go at once.
Had an aileron let go in a similar fashion, except this time it was rebuildable.
Maybe it's my technique of gluing them in. I usually think I do a good job using CA but I was just wondering if there were any alternatives that may take a little more time to set up, but I don't mind waiting if it's gonna give me a bulletproof hinge.

Has anyone tried Gorilla Grip polyurethane glue? I've heard this can be used, but you have to keep wiping away the foam that comes out at the hinge line. I'd be happy doing this if someone told me that they have done it and it works - preferably better than CA.