Well, if you don't mark them(band) you may forget pretty quick, unless you take good pics when they dry in the divider...even then. But it's fine, good test for your dividers for the future.
I suspect the wall/mesh openings won’t hold the rambunctious chicks back. This one is trying its best and has almost made it through several times. I shall name him “Bull.” This chick has a bad case of “bed head”
and I can see the little uropygial gland. 
Plugs are OUT!Yeah! A hatcher!
CAM = chorioallantoic membrane. It’s the blood vessel network that should develop throughout the whole egg. Turning causes it to disperse properly.
When development starts, it’s small, and localized. Turning promotes the dispersion thru the whole egg.
I took this pic half way thru a turn as I rolled the egg. You can see how it’s only on one side, which was the top before I started the roll. It gravitates back to the top on its own and gains more ground each time we turn them.
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So cuuuuuute!
Remove those plugs! (Trash them!) Don’t worry about the gages now, just keep the same amount of water you have, and all should be fine. The numbers will fluctuate, but ignore them. The eggs/chicks need the oxygen and ventilation. The water may evaporate more quickly, so keep it up, but don’t fret over a number now. You know the chicks are hatching, so job well done!
Oh Lawd! “Bull” has encroached into Buckeye territory. What am I gonna do?@aart
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They are strong, but then again if they weren’t they would NEVER get out of that shell.
First time I hatched 2 different breeds in my Brinsea Octagon, I built a “wall” from the foam pads that come with the turner rails (about 10” long, 1/2” square) wrapped some sewing thread around a stack of them. Looked perfect to me!
They still climbed over it!!
