Ok, so several had internally pipped the night before, but only the one made an external pip... after sitting overnight without external pip, I made safe holes for the rest, you can tell when they need it cuz thry tap like crazy on the shell... left them for the entire day with just safe holes for air... then late last night, early morning I start enlarging the safe hole... if they peep, I continue to open up the air cell, leaving the inner membrane intact... veins still visible, so use qtips and vaseline to keep it moist, make sure bill is clear for breathing and return to the bator til they are ready to finish... I never take them out of the shell or inner membrane... when they are ready, they will come out, plus that struggle is good for them to strengthen up their legs and pull in the blood from the veins... I did lose 2 that internally pipped with too much liquid still in the egg, unfortunately, but have a half doz still sitting nicely finishing their absorbing...
It is a long, tedious job in assisting Calls, but the key is in the stages and knowing when and how far to go each step... it's a learning process for sure, but if you don't start soon enough, they suffocate and to soon they really aren't ready...