Here is the start of the first complex scale model. A NIH model (Not Invented Here) having been obtained on Thingiverse. (https://www.thingiverse.com/thing:1363887) created by a fellow who calls himself Raby.
It's a small (bobber) caboose. The scale is 1:32 or 3/8 inch = 1 foot. That makes it a good size model. It's a commonly used scale for outdoor garden railroads. In the 3D printing hobbyist culture its part of the OpenRailway free design sharing movement.
This is a good example of the kind of projects I have in mind. It's not extreme accurate scale or flawless. It does present the concept of printable components with a hobby grade FDM 3D printer.
I'll post again when I have all the parts made and assembled.