While I am on the subject of scaling (see my other thread re. Model space scale), a minor gripe re. printing scale:
I think the accepted fashion is to express a 1:2 scale as 50%, not 200%. It all depends on how you look at it though…
Max.
1:2
HALF SIZE : 1 millimeter on paper =2 millimeters in real life
The drawing is half the size in real life so 50%
Source: http://www.archaeologica.org/Drawing%20to%20Scale.htm