Hey guys, where does the weight come from in these guillows? I am not sure what an average plane with a 31 inch wingspan weights but mine is only running 8 ozs so far. That is the fuselage, wing, all control wire control arms, rudder and elevator. Nothing is covered yet, the wheels are off, and none of the plastic is added (I am only going to use the cowl and the canopy).

Is it just the batteries and servos that bring it up or is 8 ozs pretty heavy already?