My Dad has one of the standard foam incubators WITHOUT the circulating fan.... he has had poor luck at hatching the last few times. I borrowed it this weekend and I plan on adding a computer fan with a 12v power supply. Any reason this would not work? Should the fan be on high or low? Its a little giant I think so where do I add the fan? I plan on testing it this week and maybe adding eggs by the weekend. Any suggestions?