3D Printing, 3D Prototyping, CAD design and Rapid Prototyping. CAD Computer Assisted Design 3D / CAD Drawings for Rapid Prototyping CAD technology enables the creation of fully functional prototypes, as well as access to the necessary engineering and CAD assistance to bring the product prototype concept to life. The 3D Printing Expert is a full service rapid prototyping service provider offering a wide range of prototype technologies and materials, providing the competitive edge you need in the product development process to help you get your products to market faster. We are a full service “Manufacturing Design Drawings” company for product design manufacturing & production. Manufacturers will request a STP, STEP or IGS, IGES file design.