Feel free to ask as many questions as you like! For me, I took them off the turner day 24 and then went into lockdown day 25. My incubator came with a small LED flashlight but by day 23 all I could really see was black and in one of the eggs I saw slight movement. All 4 eggs were alive of course but I just didn't have a powerful flashlight so I stopped candling on day 23. Prior to day 23, I pretty much candled once every other day and towards the end once every other two days. I looked up what day do ducklings internally pip and it's usually on the 26/27th day. From there they have 18 hours of air to externally pip. I had no idea when mine internally pipped as I couldn't check with a powerful flashlight, but on day 27 in the afternoon 3 out of the 4 eggs externally pipped. The one egg that didn't externally pip yet was wiggling like crazy, and was the only egg that was wiggling. In the night time I could hear chirping coming from the eggs. Finally from 2am-5am (day 28) all 3 eggs had hatched. The fourth egg still no external pip so at 2 am I made a safety hole. I used a clean new flat end screw and very slowly with very little pressure made the safety hole. I could see it's little beak and felt much better knowing it could breathe. 10 hours later and lots of help, the fourth duckling was finally hatched. All in all, only make safety holes if no progress has been made. Since I had 3 ducklings already hatched, and the fourth hadn't externally pipped, I knew I had to intervene. Most likely the majority of your ducklings will hatch with no problems. Heck, one of my ducklings externally pipped at 3pm and didn't hatch until 2 am, so it took that duckling 11 hours from external pip to out of the shell. Meanwhile, one duck egg had pipped at 9pm, 6 hours later from the first egg that externally pipped, and yet it hatched by 1:20 am, so it only took 4 hours from external pip to hatch. As you can see, the time varied. One egg took 11 hours to hatch, and one egg pipped and zipped and hatched in 4 hours. Rule of thumb, by day 28 there should be an external pip. So day 27 just wait and be patient, then day 28 if there's still nothing, make the safety hole.