Can someone tell me step by step how to hook up a pc fan to a still air incubator? I have a little giant model 9200 and I want to make it into a circulated air incubator. Instead of putting out $40. +/- , I'm think I can get a pc fan at an electronics store to use, as this is what the air fan kits are...minus the correct size bolts and nuts to attach to the top. Any information will be helpful. Pictures would be an extra bonus!!!