Scott,
Nose heavy isn't usually a problem. It may be sluggish but it will be perfectly flyable. The leadouts should be around 3/4" behind the CG to start. If the plane is sluggish, you can start adding tail weight in small increments until you're happy with it (and move leadouts back accordingly). Tail heavy is a different problem and can cause real problems flying if it gets too far back and becomes touchy and unstable.