What method do you use to cool your Antminers?
There was a video about facing the heat sinks outwards... and attaching 4 ARTIC PWM fans.
The total cost to do this is around $20-$25... Hopefully it should be worth it in the end.
4 fans on the outside blowing on the chips and 1 in the front pulling out. Here's an older pic, but you'll get the idea:
https://bitcointalk.org/index.php?topic=443718.msg4920949#msg4920949