Not all CA hinges are created equal...... The typical hinge in an arf is just that typical. Try the blue radio south 1/4 scale ca hinges. I have had them for over a year in my bme powered gp patty. I have had 2 fail on the rudder after a year but I dont think that was there fault. I use the rudder hard in low high alpha KE and figure 8's and time and vibration took it's toll. I have seen robart pins pull clean out of a 35% gasser on the third flight on the rudder. any hinge can have a failure. Just use a quality ca hinge. Of course there is a limit to a ca hinge IMO, I would not use one in anything over 27%. Ohio superstar also makes a giant scale ca hinge (10-20 lbs) I have used them on several fun flys and have never had a failure with them flying them very hard