ORIGINAL: w8ye
If the plane over reacts in pitch, it is a sure sign of the CG being too far back especially at landing flare out time
Put some weight in the nose and see how it flies and if you like it or not?
Actually, it's a good idea to do a couple of CG tests before you start adding dead weight. There are a couple flight tests that show tail heavy pretty quickly. If it doesn't show tail heavy in a dive test or the amount of elevator to hold inverted suits you, then all you need to do is shift the elevator rigging. Move the connection one hole out on the elevator horn. The testing takes a minute, and moving the pushrod another two. And you wind up with an awesome flying airplane.