construction question

[Mike Butts <buttsakauf-at-earthlink.net>]

Construction- Does this mean that a "paper only" tank is not allowed or that any 
tank that was not put into regular production is not allowed. In other words, Can I 
build a tank that had a few prototypes made for evaluation purposes but was not 
produced? The prototypes were produced for military purposes and had been tweaked 
into a final production design, they were just "shot down" and were not allowed to 
be produced.

"Historical Basis
All vehicles and weapons systems must be modeled after a real vehicle or weapons 
system that was actually produced for military purposes during any time period. 
Prototype or concept designs that did not result in a production design are not 
allowed."

Mike Butts