I bought a Little Giant Still Air Incubator the other day at TSC along with an egg turner, but they do not carry the circulation fans. I understand that a fan will help give a better hatch rate. TSC can order a fan but it will take about a week to come in. I will be setting some eggs on Tuesday or Wednesday and wonder if I can install the fan when it gets here without harm to the eggs. This is my first time incubating eggs. Now here is a stupid question: How does that egg turner work? Do the trays just tilt from side to side? Doesn't look like there is any way the eggs can totally turn over like they would if you did it by hand. Also, is there any harm in not candling the eggs to see what is fertile? Aside from keeping a check on the temperature, I figured I would just stick them in there and let the machine do its thing until they hatch. Or would I end up with a stinky stink if non-fertile eggs weren't disposed of? And since my questions might be silly, if you tell me I don't have any business hatching eggs I won't hold it against you!