After finish the Product Design, will need to make a rapid prototype to test . In the old way, it is normal way of CNC and vaccum molding. but not add some new ways to make (3D printing for plastic and metal, simple injecting molding ). Some Advantage and Disadvantage of each way: Machining Way CNC vacuum molding 3D Printing simple injecting molding Advantage Good Strength and Quality Good for sma...