The way I was tought is hold both ends of the prop only dont hold the fuse and have someone else hold the tailsection with one finger under the fuse at the very back of the plane if it is properly balanced it should remain flat if the latteral balance is off in either direction the plane will have one wing dip down depending on witch side is heaviest .If it is off it does make for some ugly flying hope thisw helps .have fun and keepem flying