I have seen several people make reference to putting their eggs in cartons for lock down and hatching. Reading over the site this is the first time I have seen references to this. I am in my my incubation and Monday they go in lockdown. What exactly is hatching in cartons? Do I cut out individual cups or groups and set eggs in? Do I put the eggs in the same as in turner, small end to the bottom, large end to bottom, air sac up?? What is the benefit over just laying the eggs on their side? Please enlighten me.