I just wanted to chime in about the snarky remark about scratch building and 3D printing. I can tell you for a fact that there is a LOT of handwork for most 3D prints.... We get some 3D models from Sikorsky and they require a ton of work to get smooth and paint ready. Our skills are tested with each model from start to finish. Try it some time! A robot can only print what we tell it too and there are a lot of errors to correct most of the time.
It really does not matter how we come about the parts to make any model, whether from hand-carved wood masters, resin molds, 3D printing, or whatever, there are skills and crafting required, so YES - 3D is scratch building at its base level. As an artist and a modeler, it does not make any difference how one get's there.... just as long as we do - and the finished product looks.
Give me a 3D printed bunch of parts and frankly, sometimes it may be easier to carve it in wood than fill, prime, sand - fill, prime, sand -fill, prime, sand, fill, prime, sand....... but at least the bones are there.......
You get the picture!