I saw this ebay ad: Mini Brinsea Advance 7 Egg TRay, it says in the text "You can also use in the mini eco to turn it from a manual incubator into a semi automatic version." -what does this mean? Does it mean it'll turn eggs? I'm curious as I'm buying some hatching duck eggs and I may be away for a few days during the incubation period. I have a house sitter who comes twice a day but that doesn't get the eggs turned 3 times, unless I have her turn them when she first gets here, go do her stuff and then come turn them again. Thought?