Yes, that also struck me. This guy obviously knows his stuff now, but he would have been well served by (American style, which I don't know if there is a similar system in Poland, so this point may be moot to his particular case) an introductory Machining course at his nearby community college. Some of the mistake he made early on are very basic. But then he learned from them obviously, and he's also seems rather very determined. It's a great story and website.
Of course, I'd also say that for many people, a typical type of reaction to CNC machiningi is: "Oh, you just put the file of your 3d part in the machine and it makes it!" Nope, not that easy.
Of course, I'd also say that for many people, a typical type of reaction to CNC machiningi is: "Oh, you just put the file of your 3d part in the machine and it makes it!" Nope, not that easy.