The thing I have never gotten to hatch is if the air cell has bubbles, or is no longer a single air cell.I used to incubate them upright. Since my Brinsea's turner broke (again) I only have my Nurture Right to use at the moment, and in that I can only do them on their sides. Which is not a good thing for these eggs.
I could probably start them in my Brinsea and try to hand turn, but that's a giant pain to remember. I probably will though, thinking about it. Better to give them a bigger chance of making it.
I find that usually detached air cells means the package was handled very roughly. Meaning it's not necessarily the detached air cell that caused them not to make it, but it's a sign that they might have been scrambled too badly to develop.
Hopefully if you incubate upright a few will hatch. I looked them up, they look cool.
And rolling the Brinsea is pretty easy. Just figure out a way to remind yourself to do it. Remembering is the hard part.