In case you all haven't seen this...the Mk II Army Builder:
http://www.engineeringcalculator.net/ArmyBuilder.html
Under "Controls" there is a drop down menu allowing you to switch between Prime and Mk II.
I know the math isn't hard these days, but I like to use this option when I have access to a computer and don't want to carry all my cards or books around (like say...at work).
Enjoy.
Chris
