I'm not sure if this is the correct place for this so I apologize in advance if it's not. My aunt used to raise all her own chickens,my uncle ran this incubator many years ago without power, as they didn't have power back then. Sadly my uncle passed away many years ago in a car accident and my aunt knows little about how this machine originally worked. I'm likely going to convert it to electric heaters and fans but would LOVE info on the original operation of this incubator. It's an outside, large self contained incubator, approximately 6' tall, 6' wide and about 4' deep, she still has the trays and racks for it. She thinks it was last run about 27 yrs ago, any ideas where to get info from?!?!?! Thank you!!!!