I have a pretty decent working knowledge of hand tools. Hand held power tools are not beyond me. However, the vagaries of life have revealed that I must become one with machine tools. CNC machine tools to be exact. All of this happened because I can make a computer behave. Nobody believed me when I said that there is a big difference between keeping a computer between the lines and making one do what I want with very sharp, very dangerous tools connected to them that spin at high speed. I predict a big mess, a lot of mistakes and blood.