I used the robart hinge points on mine and used gorilla glue (poly urethane glue) to hold them in place. The glue foams as it expands and give a bit of confidence in filling up the gaps created for the ca hinges. Keep an eye on them for a while, use alcohol to clean up the tiny bit of foam over and they set up like steel. A bit of vaseline on the hinge itself will help insure that you dont glue the hinge together. I read in the big post on the wagstaff that a few people had noticed the rudder ca hinges had cracked after a bit of use. Not an acceptable risk for me.