Posts like these are great. They show how people all have excellent hatches utilizing completely different methods.

LOL are you cereal? use their feet? You've been using incubators too long to remember? You should get those hens on Ted Mack's or post on You-Tube. Should be a simple matter to teach them to juggle, LOL
I read back in 4H or FFA days, and I see the hens roll them when they return to their nest, rolling them as they "do the twist" settling into the nest. When they finish, the use their beaks to scoot those that pushed out to far.