I knew I'd arrived with files and saws when my metalwork tutor was asked for someone to copy a security key. With a whole college to choose from he picked me. I cut it out of mild steel on a bench pin, got 40 Bensons and she said it worked better than the original which slightly worried me. I thought it would work the same. Maybe she was just being kind :whistling:

I was taught well for 3 years. I can make most anything by hand (so long as I can find my +4.0 close up glasses for the fiddly bits). OTOH CNC is much easier if you can live within the constraints of 2.5D and radii on internals