RE: Questions on CA Hinges
CA hinges are JUNK. On one glow plane I lost one aileron, one rudder and two elevator halves, (at different times), ...on a single plane. (If you count them all, I have had AT LEAST 18 CA hinges fail in-flight.
Before I went to gas and giant scale, I switched to Robart hinge points on my glow stuff. All of my gassers have pinned hinges wih Gorilla Glue and, if needed, CF pins through the balsa.
CA hinges are nothing more than a cheap way to sell an ARF. Upgrade your hinges or learn to fly with a broken control surface or two...very quickly.
There is one exception, Radio South has some Mylar CA hines which are excellent, but I still use pinned hinges in all my planes.
There will be many more who say that CA hinges are fine, and they ARE, if you don't actually USE them.
Run away....FAST. Get a Robart hinge-point drill guide and some hinges. Get some Gorilla-glue and keep on flying.
Have FUN!!