[looks closely at pictures again]
I think you're right. I didn't see that the first time.
Yes, that would certainly prevent all the problems I was worried about.
Looks really pretty!
But I'm a little concerned about that plywood that's making a sort of inner-roof: I expect the chickens will try to fly up to sit on the edge of it, and walk around on top of it. So then they will be pooping on top of it, and you'll have no way to clean up there. They...
Wow, you've been busy!
Nice update!
If you gently put them back the correct way, they are probably fine.
I think the important time is at the end of incubation, when the chick is too big to move much but needs to be properly positioned in the egg to hatch. So as long as the chick is still...
Yes, you can have the roosts away from the walls.
People often put them near the wall to have them out of the way when the people walk around tending the chickens and cleaning the coop, but I don't think the chickens care much.
You might be able to make something moveable, such as like bars...
Openings with hardware cloth for ventilation: sounds good to me.
Glass windows in addition to them: also sounds good to me. As long as you do not reduce the ventilation openings, and you have already planned for the glass windows to be shaded in summer, I don't see any downsides to having them too.
Probably a breed thing, if it was there at hatch.
It could go either way.
If you have several with the same coloring, comparing combs among them might be a good way to see differences (same breed or cross, different comb often means different gender.)
Yes, males are normally bigger than...
Yes, it can be quite accurate when they are bred to have the right genes. But it's unlikely to work with yours.
Some males become obvious as young as 3-4 weeks old, because their combs & wattles get much larger and redder as compared with the females.
Many males are obvious by about 8 weeks...
Feather sexing does not work on most chickens.
It only works when someone crosses a fast-feathering rooster to slow-feathering hens.
Where did you get the eggs? Did the seller say anything about sexing? If they didn't say, then it's probably not the right kind of cross.