Well when I got my case they used a machine to drill the screws in, and they were in really tight. So I sat there trying to unscrew it for such a long time and I managed to mess up the inside so when i finally got my hands on a drill where I can drill it out, the screw wouldnt turn. The insides were messed up. My cooling isnt good enough and I want to add thsi fan to the front and a Denki where it is now at the back. How do I go about removing this fan?