One thing about this thread is that we have proven that there are multiple methods that work, depending on individual circumstances. Granted, the whole idea behind hatching chickens is basically the same, but I believe we have to find what works in our own conditions. I actually went to look at my Brinsea, because I didn't think it even had any bottom vents. It does, but they are just 4 small holes (smaller than a pencil around) on the bottom of the bator, and they are not closeable. There's only one on the top, with an adjustable slider cover. I left it wide open my last hatch, and I was very happy with the outcome, so I will do the same next time. If Brinsea reads the study, and changes their design, then maybe I'll consider it.
I don't mean to knock surveys and such, I just think we all have to decide for ourselves what works for us. Tips, tricks, and gathering experience from others is wonderful, but it still comes down to my eggs, my way.
You have had many successful hatches, and have lots of fine birds to show for it, so I don't blame you for doing anything the way you want to do it.
Same here
. Feels like we are about to become aunts again!