Comment by cm2187

I don't know how expensive is the stuff you were making but if it was just about cutting metal it can't be that expensive. Isn't testing samples the 101 of engineering or have we gone 100% trusting CAD now? It looks to me that there are so many things that can go wrong in real life like deformations because of temperature, different calibrations on different models of machine, different composition of the material used, etc...