Can I replace the stock fans on a Hyper N520?

NotSoHonestAbe

Honorable
Sep 24, 2012
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10,690
I'd like to replace the stock fans on my hyper N520, but can it be done? I don't see any visible mounting hardware for either of the fans, only some obscure looking screw on the top of the heatsink. Also, what size are the fans, and can anyone recommend good, quiet fans?