I have similar situations. I have been finding that experience is the best way to figure something out.Maybe, a lot of people say this but I've had hens kick perfectly healthy eggs out and stay on eggs that are about not explode. So I hesitate to be a firm believer of this, lol.
The following people are people that set eggs. If any of you on this list have your final hatch numbers, will you please let us know how many hatched? We need your final hatch numbers to finalize one of the contests. If you aren't done hatching, don't worry, just let us know the number when you are done.