The new evolution of my Zero fixed blade knife. 3D Printed (for now). This is the 7th revision. Having a physical model is invaluable to the design process. For one, you can't test and confirm ergos on a screen. But it also forces you to deal with the design from every angle not just a few orthographic screens. How do details look from every angle. How do they feel. 3D printing allows me to test designs in the hand relatively easily. If I'm honest, there is no way I would have machined 7 prototypes of this one design. Way too time consuming (maybe I'm lazy). But 3d printing really has helped me design a better knife.