I am locking down for the first time in my Brinsea and was surprised to find a profound difference in the air cells. Some looked perfect and others looked more like Day 12/14 size. Embryos have developed fine and you can see movement. It wasn’t an age issue as all are marked with the date laid over a 5 day period and I did not see any correlation to the age of the egg. It didn’t seem to be a small egg vs. larger egg issue either. Anybody have other ideas? I’ve only incubated a few times but I haven’t seen this kind of inconsistency before.