And as far as buying CPU fans .... Just head down to a small computer repair shop and ask for a couple differant CFM CPU fans. They will likely give you several used fans for just a couple dollars if not for free. I picked up 5 differant fans locally for free. They were only ask 50 cents to $2.00 for them but after I explained to them that I wasn't sure what CFM I wanted they just gave them to me.