I don't know how to post a link to that thread, but it's by ZuniBee and the title is Ooops it's not day 18...or something close to that. After reading that thread last week, I put last week-ends hatch in the hatcher in egg cartons and then the last couple of days I did the next bunch the same way. They've hatched really well that way....I think I'll be doing it that way from here on out. I never did think all that rolling around was probably good for them.....they don't do that under a hen. They pip and zip around the egg and then just pop the top off. I too wondered if they'd have trouble getting out of the carton and I have not found that to be a problem for them.