Okay, yes, I have been seduced into building an incubator. It was just too easy to say 'yes' when I had nearly all the components (formerly known as 'junk') in my shop. So far, I have the heat source, thermostat, ambient thermometer and a blown out egg filled with gel and temp probe placed inside. I found a fan on ebay and am waiting for it to be delivered this week. In the meantime, I am trying to get the ambient temp and the internal egg temp close to the same but I end up with egg temps which vary between 94* and 102*. I'm thinking this is not acceptable. So, my question is, am I shooting for 99.5 both incubator temp and egg temp or is one going to be off? I really hope instaling the fan will make a huge difference.