RE: landing bounce
The plane is tail heavy. Doesnt take much either. Ihave a 4*120 and the first couple times I landed it, it would bounce. Turned out to have lost almost 2 ounces of nose weight from the time Ifirst ran up the engine, to the time of the first flights. Ifound the weights in the back of the truck and glued them back on, now the plane lands good, without bounce no matter what the speed is.