You need to review the Myth 1. Electric planes CAN take advantage of the lighter weight because of the smoothness and they need the help, BUT you are after something else; it is not even a focal point. You need a system that will power XYZ the rest of the world does not matter. You are not out to improve plane performance so you dont really care. Pattern planes go through this and there is a lot of reading if you want to search for it. You build high drag, relatively heavy planes because of the scale details, and you are not going to stop. Actually I think your planes are light for what you are doing. Lighter planes fly better, but they can only be so light, and most electrics are stripped down shells. If you took one of the light planes and added your touch it would be 2 pounds heavier. You will need a bigger motor and bigger battery. In full size airplanes it is called derating. You will want takeoff power to be at about 75% power at full charge, you want the rest to be a reserve, as you want to use the other 25% as reserve capacity. As you fly it is like a slowly sagging glow engine. As you fly, power goes away so when full throttle only gives you what you had at 75% it is getting time to land. Slam to the stop takeoffs is not how it;s done.