I agree it makes for a cleaner elevator if you pull full up elevator fast (very slow air speed of course). Some times I even give a quick down elevator and then full up to snap it into a harrier or elevator (many 3D people do this actually). I had a few planes that did what yours was doing not matter what I did. I don't believe it was for lack of elevator throw or CG. It was a fun fly profile and the wing was too stable (square wing tips). It totally bummed me out that it did this and I finally sold it. I started out with a Funtana 40 and that thing did the most awesome elevators, especially inverted. But it had the tappered wings and was very unstable (hence the sudden snap and many crashes). But it couldn't harrier too well...not in these thumbs anyway. It would rock like crazy.