I would not go that high with the humidity during the incubation phase.
If a person wants to be hands on, check egg weights for weight loss and adjust humidity accordingly.
Normal is 28 days. Mine tend to hatch on day 27.
30 t0 40% humidity during incubation. Raise to 65% to 70% for lockdown.
Day 25.
Make sure you check the temperature with a calibrated thermometer. Use a salt calibrated hygrometer to check the humidity.
Run the incubator with the vents...