on the bottom of this case http://www.newegg.com/product/product.asp?item=N82E16811119121 i wanna know how big the bottom vent is. i wanna put some fans down there. i dont know wat size tho. im guessiing 80 mm would work. i got 4 80 mm fans on my wishlist but before spending another 30 bucks on fans i wanna make sure they fit. but i wanna be sure and get the best fit too. ill prolly mod them on somehow. i just need to know wat the demensions of it are. lenghth and width. thanks.