According to all the RC build manuals,the flight characteristics of the wing are not modified by weight,although the total envelope is.A wing stalls,when it stalls,because of the design.If you build in washout,as pointing at my original question,you can create better flight characteristics.I can expand that (improve on that) by lessening wing loading,but I would be unable to change AOA generated stalls, regardless, since the wing configuration generates those,relative to wing speed and thrust. Don't get it wrong,building light is a necessary component to staying in the air,and also being able to control the flight path up or down.The plane has to be responsive to input,but the wing,as we get into larger and larger(realistic) designs,has to be optimized for airflow.That is why we talk about washout,at all.