The auto turner in my incubator rolls the eggs back and forth as they lie on their sides. My first few hatches I left the eggs on their sides for lockdown. My next two hatches I put them upright in cartons for lockdown. I got a MUCH better hatch rate with the cartons. I think some of that may just be due to the hatching learning curve and me learning to leave the eggs alone and let them get on with things on their own, but I'm still going to stick with the cartons from now on. The chicks zipped more quickly and cleanly and the ones that popped out first couldn't kick the other eggs around the bator. And having the eggs in cartons makes it much easier to keep track of each egg. Also, I used cardboard egg cartons and my humidity was above 80% throughout lockdown and I had no problems with the cartons getting saturated or anything like that.