Hmm, nice. Would be cool to know how to do all these. I wouldn't have to look for a machinist whenever I have something I'd like to create.
There is always the option of a 3D printer, but the cheaper ones have limitations. Nice piece, enjoyed reading.
I don't think 3D printing will be an option against machining, not yet but it could if the materials used in printing are as strong as the materials we are machining.
But its a great angle to look from as an engineer, someday someone just might work on that.
Hmm, alright.