ORIGINAL: JohnBuckner
OK first as everyone has indicated you are freaking out for no real reason, it would be rare indeed anytime a kit build or an arf comes out as advertized, that is in most every case BS. The simple fact of the matter is the manufacturer has a vested interest in not telling the truth.
DItto.
Fly the plane.
I have a Tiger 120 that needed over a pound (in fact, 18 oz.) of nose weight to make the CG. I thought it would be way to heavy. It flew like any of the typical Goldberg Tiger aircraft, it flew just fine.
So, as stated, just fly the thing. If it were electric, that would be different because more calculations would be needed to pick the right power system (Battery pack, ESC, and motor). According to the OP, and the picture provided, the power is glow, so it probably will only make a difference in a slightly faster approach and landing speed.
My simple advice is keep it simple and stay away from LiPo and regulators. Go with NiMh or LiFePO4 packs and fly the plane.
CGr