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unless you use the mark forge - their parts are amazing. Yes I've handled them.

Bob, don't discount things just because you have no experience of them :-)

there are currently two methods of printing with carbon fibre.

You can buy cheap (ish) filament for ordinary fdm machines that is usually pla with carbon fibres mixed in.
It's not true carbon...

yes the technology for all three exists.

metal printing is very bloody expensive.
Comes in a variety of flavours - including add ons for existing cnc machines - every single one: very bloody...