Now another question comes up regarding modifying the cooling of my case/ computer etc. I was wanting to carve two 3 1/2" holes in the top of my case, for two 12cm fans. Now I know fully how to do this, however, I was wondering which direction the air flow should go. Should the fans blow into my case? (Like I suspect) Or should I have them blow out? The orange highlights are the fans I wish to add. Which direction should I have the air flow setup?