Never heard of one (avid birder and coturnix keeper) so had to Google it, pretty cool, though I personally hope to see a California or gambels someday, I don’t aspire to raise them (and motezumas are gorgeous)! I’ve had great and terrible hatches with shipped coturnix eggs, I hope yours goes well, detached or saddled air cells are a very bad sign. On shipped eggs I rest them for 12-24 hours unless they’ve been in transit for a week, then I just let the temp equilabrate for a few hours and start as old eggs are probably a bigger issue than air cells (if the embryos have been damaged by shipping, detached air cells are a symptom rather than the causative issue, sitting still isn’t going to fix that and getting older and adding more age damage will worsen it).