Hi Chris
I downloaded the file from
www.thingiverse.com/thing:272930
It is much stronger than I expected and it even has the servo mounting screw holes included.
Checkout the thingiverse website,
www.thingiverse.com/categories
for stacks of printable items.
There are CAD packages available and some are free. The learning curve is pretty steep and I am not even on the ladder yet!!
I suspect it wont be long before you will be able to download almost anything without having to design it yourself. The file could be for a full size object with as much detail as possible. The printer software would allow you to scale it down to whatever size you required.
ie:
Fully detailed cockpit.
Fully detailed Pilot.
Fully operational, (Sliding or opening) cockpit canopies, (PET material).
Metal 3D printing is available as are tabletop filament extruders. (A sudden demand for scrap plastic on the horizon!!)
The possibilities are endless.
Ron