Yeah, I don't think low-cost 3D printing is yet where it needs to be for this purpose - but PLA definitely is the wrong choice. I wonder if the sinterized metal

Yeah, I don't think low-cost 3D printing is yet where it needs to be for this purpose - but PLA definitely is the wrong choice. I wonder if the sinterized metal/ceramic printers have higher resolution. (Admittedly, I have little knowledge of this class of printer. And, generally, I still prefer subtractive machining for precision parts.)