Pat roy I can't beleive your last statement. All I have to say is I test fly mutiple models and engine combos at the different fields I fly at. You most definitly can feel a change between models and the different engines people install in them. The best flying and most responsive Giant Scale planes are always the ones that are lighter with high performance engines like the DA's ,ZDZ ,BME, 3W. And my thinking is if your going to spend close to 2Gees on a model I would think you would want that model to fly the best it possible can.