Well, I'm just starting to try 3D stuff and I think I have a CG problem with my plane setup. I have full 3D rates programmed into my 1/4 scale Cap. But when I try to do an "elevator" I run out of elevator throw and the nose falls trough. This leads me to believe my CG is still to far forward.

Here are my two basic questions:
(1) How sensitive are these planes to CG movement, i.e., does a little go a long way?
(2) What is the flight characteristic that tells you, you are getting the CG to far back?