there is an article on spcr on the way they are testing airflow. they found out, the way it was done before was a bit misleading and changed it. still leaning towards the way you are doing this vapor ...

have alook at:
http://www.silentpcreview.com/article734-page1.html

and the discussion on this article at:
http://www.silentpcreview.com/forums...er=asc&start=0

btw. great job, vapor and very helpful - thanks for your work!