bobby,
What are your goals in RC? If you ever plan on instructing, and if your club doesn't provide trainers (planes), then I'd hold on to it. Besides, once you get further on, you'll find that pulling out a trainer once in a while for slow casual flying can be nice.

Move the CG back, fly it, then move it back some more. Eventually the plane will start to feel unstable; move it forward a 1/4 inch and leave it. The plane will be more responsive, but still be a casual flyer.

If your primary interest is 3D, then sell it.
Dennis-