stirkle & anyone else that may be interested: Go to page 1 of this hatch-a-long thread to see a list of info that I've collected. If you haven't seen it already, look at the *Hatchability ................ site; there is great info on daily development leading to lockdown.
"Lockdown" is done by me on Day 18, where you stop turning eggs, raise the humidity & no longer open the lid until they hatch. You stop turning the eggs because the chicks are positioning themselves to reach for the air cell when they pip the membrane for their first breath, then pip the shell for more oxygen, then zip the shell to get out. So, the last time I touch the eggs are on Day 18 to position them in egg cartons. Not everyone uses the cartons, but that works best for me.