There is no one perfect humidity that works for everyone for many different reasons, it can be a bit of trial and error to determine what works best for you. As you can see several people have determined that a fairly low humidity around 30% works best for them. I’ve found that somewhere around 39% works best for me. Some people are quite happy in the 40%’s. There are different ways to adjust that humidity.
There is science behind hatching but in the end each incubator is different and where we have them are different. Even the professionals with incubators that might hold 60,000 eggs each have to tweak the individual incubators to get better hatches. There is some art involved as well as science. But the good thing is that there is a reasonably wide range of incubation humidities that will work. You don’t absolutely have to be that exact with humidities. There really isn’t a whole lot of difference in 43% and 46% as far as getting most of the eggs to hatch. What we are talking about is maximizing the hatch which takes some experience and trial and error. Right now I see no reason for you to get upset or worried. You will probably do pretty well. Sure hope so.