Thank you everyone for taking the time and responding. I will assemble the whole plane, with the motor, servos, reciever,and wheels on the plane. Before cover it ,and weigh it. and figure on where to install the battery. Will build a hatch if needed, for battery access. And if needed to be can either go with a alum. or plastic spinner, or even just a propellar nut to keep the balance to where it's suppose to be to cg. Thanx again.