3 days ago I was given 5 bantam eggs that had been under a broody hen for an unknown amount of time (could have been a day, or weeks). Before putting them in the incubator on Sunday I quickly candled them and they seemed developed to different stages. some more in the 12-14 day range and 2 others much closer to 18 (1 was super dark). The most developed one started rocking the egg 2 nights ago. Last night I smelled something off so checked each egg and sure enough one stank (one of the lesser developed ones) so I threw it out. In the meantime, the most developed one cheeped at me as I was examining it. Which means as I understand it its internally pipped. Despite some effort on its part, 24+ hrs later it hadn't externally pipped. So after much debating and reading https://www.backyardchickens.com/a/step-by-step-guide-to-assisted-hatching a couple times, tonight I decided to try to gently but quickly externally pip a hole in the air sac area to help out. And I managed to get a little hole chipped away... I think not directly above its beak but more at the edge of its beak and put it back in the bator. It cheeped a little through the process and now seems to be resting. Humidity is in the 70-80% range, and temp around 99+. My plan is to give it 24 hrs to start pipping before I consider any additional help... does that sound about right? I'm really not counting on any of these eggs to make it with such an unknown and a bit unfair start. But darn it when they get to the chirping stage you can't help but start pulling for them. I'm totally new to incubating so advice is appreciated.