I suggest you cut a 120mm hole from the top to suck the air out.. maybe two holes. Then cut two more holes from the bottom where it will blow the air in. That's what i'm doing to my mod.. although still haven't updated it. I can show you once i've done it lar.. ok. Don't do on the side unless you don't mind that ppl can't really enjoy the view of the inside when a 120mm fan is blocking the way. Keep ot up mates... cool mod.