Thank you for debunking that myth! I always wondered about ‘letting them sit for 24 hours’ when they’ve been in transit a week already (time is not your friend), the air cell won’t magically reattach if it is mobile, and the genetic material is already damaged, what is the point? I get letting them warm to room temp for a couple hours so putting them in a warm incubator doesn’t completely shock them or cause cracks due to sudden changes in intra shell pressure (here in Siberia most eggs come cold!) but 24 hours? My last batch of saddled eggs I tossed immediately in the incubator (after the room temp adjustment period) and got the same hatch rate (25%, ugh) as I did on the previous batch of saddled which I was careful to let sit, incubated upright, hand turned…so I think it makes me feel like I’m doing something but doesn’t actually help the egg, the damage is done.