A long long time ago
I can still remember how
that music " My Son at 5 years" used to make me smile.
He still does. Any how. He ask me. How is the Universe made and made of? I said to him. If you look everything Big, little or small and then put a beat to it. It comes down to patterns and scale.
You might try checking with your local high school too. Ours has several 3D printers and the kids are really good at the stuff they do.
In the mid 2000's my son was bringing home 3D printed objects from school. I was going to have print a few thing in High school. When you hear the Thunder, Lightning has already been there. Before one knows it there out of school!
Now he has 2-3 3D printers. From what I understand. is is sensitive to temperature, vibration and the media used.
So the point about 3D printing. For the most part it's in the consumer stage of infancy.
To do this in you home now it compares to having a Blacksmith in you shop.
As I said about pattens and scale. There is always field adjustments from the engineering drawings. Been there done that from the smallest thing to the biggest. The media in water treatment plant to Highways, Bridges, Power plants. I could go on.
That work is ball busting work! And here's the secret! I doesn't get any easer! You just get better at it. It be comes common place.
those layer lines and the print quality sucks.
I myself would not be to quick to criticize ( Not saying you are) but to ask for help to understand how to make it better.
just a thought.: Could exterior part be built up more to be sanded smooth. Or should it come out as a finished product, with very minimal work for finishing? It's better to have object to work with then to have nothing. Thanks for your input.