Two Wheel n, the DVD idea sounds good but i'm sure that simple instructions are already out on the market. I don't follow machinist forums yet but will take a look and see if that will work out. When you go from the basic principles of machining to Screw cutting, form tooling then lot of issues arise from the condition of the machine tool itself. You can do the same operation on two different machines and depending of the condition of them, one part will be easy to machine and the other part will need different speeds/feeds/depth of cut due to lack of rigidity.
