I'm looking at this incubator for sale on Craigslist, and I'm wondering what ya'll with more experience think of it. One of the important things to me is that it has automatic turner. But I haven't the slightest idea of how a turner actually works! So I don't really understand when he says the trays are electric, but you have to use a switch. Does it mean that 3 times a day you flip a switch? "Egg incubator (chick hatcher). Has three tilting trays, reservoir for humidity control, humidity and temperature indicator and one brooder tray. Good condition, works well." "The trays are electric but you have to use the switch for them to move. So not auto." Thank you in advance!!