Built my own CNC router table, from the frame to the stepper motors, linear guide bearings, ball screws. Using cad/cam/operating system all open source. Also designed and built the Controller, power supply, xyz drives , and can configure it any way I please. Pretty much all from parts obtained from the internet. If any one wants to ban or control CNC machines, it would be a huge undertaking. And watch the prices of everything sky rocket do to this. Virtually Everything we own , use and posses was created with CNC.