hello - does anyone have suggestions for how to visually inspect air flow? i am about to build, and want to use as few fans as possible to keep noise level low. there have been a couple posts recently about strategic placement of fans, and it made me realize that you could add a fan to your system, and make things worse by creating a whirlpool - hot air staying in the computer longer than it should because you have made some turbulence or whirlpool or loop happen, -- or have one fan blowing against a current that otherwise would be moving steadily out of the computer, and so raising case temps by adding a fan. is there some way to put something smoke-like through the system? can i get cheap heat-vision glasses somewhere? i plan to monitor cpu temp, vid card temp, mb temp, and ram temp, figure out what is too hot for comfort, then modify somrething, then wait a while and look at temps again, but it seems like if i could have it be like a wind tunnel test where they have that smoke you can see, that would be cool. but i am sure it would be kind of dangerous or bad to assemble the computer next to a big bonfire, and the ash might mess things up. a misting spray thing could make things rust. etc. any ideas?