Pictured above is a hand-drawn concept art for a the proposed figure.
Pictured above is the schematics artwork for Gung-Ho. After the original
concept art was approved, detailed schematics would be drawn up to be
used to create the actual pieces.
Before action figures are molded in their normal size, sculptures and
prototypes are regularly made of the figure at twice their normal size.
These prototypes are called "Two-Ups". Pictured above is the
"Two-Up" of Gung-Ho.