I quit using ca hinges years ago when I had two failures in a row on two successive airplanes.I now use pinned hinges and robert hinge points[ The steel pined ones]exclusivly. The ca hinges are just the lazy way to do it[cheaper too] and most get away with it for a while.Most of the time the models[trainers] don't last long enough to wear the hinges out. For permanent hinges[long time use] nothing beats pinned or hinge points.