After 5 years, my front fan assembly started making crappy noises last night. I bought this thing in 2006, and needless to say, it is out of warranty. I found an $80 replacement online and I can't bring myself to pay 5 times what these things are worth. I'm willing to drill out the fans and replace them. My question is: Has anyone tried to swap these out? I heard they are two 120MM fans. I want to use the existing on-board power source. Is that a problem? Will the computer fault for the change in current? Any help or tips would be greatly appreciated.