"Navy Wheel" Master parts in HDSL
HDSL, ...High Definition Stereo Lithography, makes Master parts from AutoCAD STL.

HDSL Master

Here we see the final pressure cast Thumbwheel
...complete with all holes right out of the mold..

HDSL Master
The Ratchet on the left is produced in HDSL.
From this master Ratchets can be cast.
The nearly complete "Navy Wheel" (Rotor) is made up of several cast parts along with brass and aluminum components.