In addition to what the other guys have said, my first thought on seeing your drawing is "tail heavy". Unless you're using an unusually heavy power source (electric motor?), or your tail is uncommonly light, my gut says that your CG will wind up too far to the rear.

Also, are you using a squared-off back to your fuse pod? that creates a ton of drag. If you can find a way to taper the pod down to the boom, you'll get much better performance. Of course, this varies with airspeed, the higher the speed, the more pronounced effect this will be. At a low enough speed, it may not matter much. (for reference I've tried out the difference with a 2"x2" wide squared off fuse on a 55mph .15 powered plane. tapering the fuse made a big difference)