Explore the process of building a 3D printed CNC machine capable of cutting metal from scratch. Follow along as the creator designs and assembles each component, including the frame, gantry, carriage, and Z assembly. Learn about the use of linear rails to improve rigidity and performance compared to previous designs. Discover how to wire the machine, create a retractable vacuum adapter, and construct a wasteboard. Observe the calibration process and witness the machine's testing phase. Gain insights into the improvements made, such as increased stock clearance and Z-axis travel. Conclude with the creator's final thoughts on the project's success and potential future enhancements.