The math isn't that hard. The ratio isn't 5" = 32", its 5" = 32 feet, so:
Multiply 32 times 12 (= 384) and divide by 5 (76.8)
And yes, Aurora's scale accuracy was usually off to any degree.
-- John ___ __[xxx]__ (o - ) --------o00o--(_)--o00o-------
The history of things that didn't happen has never been written - Henry Kissinger