Well hopefully you won't get hit too bad. By the hatcher what do you mean do you use a different incubator to hatch? I'm new to all of this and still learning. I also didn't weigh my eggs so I have no clue what they need to lose or not! Mine were shipped eggs so I'm at 50% which I'm thinking isn't too bad lol! Especially if all of those are actually viable and hatch I will be glad for my first experience!
Yes, I have a second incubator I use as a hatcher. That way I can move eggs that are ready to hatch out of the main incubator, and have eggs at different stages of incubation going on at once. Currently, I just have the one batch going, but I still use the second incubator as a hatcher so I can move eggs over as they are ready, instead of raising the humidity for all of them at the same time. I do stop turning all of them on day 18, though.
Weighing the eggs is how you tell if your incubation humidity is correct. You can also candle to monitor air cell size, but this isn't as exact. Eggs should lose 13% - 16% of their weight during incubation, so by weighing them a few times along the way you can tell if you've had your humidity at the right level. Brinsea has another good article about this: http://www.brinsea.com/customerservice/humidity.html
Or you can read about it in a good article by pete55, here on BYC: https://www.backyardchickens.com/t/491013/goose-incubation-hatching-guide-completed
In fact, all of his articles are awesome, check the bottom of his about page for links: https://www.backyardchickens.com/a/pete55s-page
Anyway, yes, 50% developing on shipped eggs is pretty darn good! I hope you get most of them to hatch successfully!!!