12 oz nose weight in a plane like that screams something is amiss....I do not know you or your modeling abilities so I will have to ask??? What is the point at which you are trying to balance, what happened in the tail area (did you mount the servos back there) etc... Could you give a little more detail??? Something serious has to be bunched up in that production piece. I have had a few thing wrong with hardware in some kits, like the axle holes too small, but that happens sometimes with mass produced stuff. It just seems like something really bombed in this kit.......

Detals please