It depends on the incubator really. As for the turner question, I've always had the best luck by turning the turner off when level, and letting them hatch that way.
Turner is out, and water is added. Let it begin, I also thought I may have heard a peep. I have around 55 eggs in I think. I'm not sure Brooder is ready for em though!!
Hatching cpacity is about the same as incubating capacity Buff. Maybe could get a few more in there without the turner, but I wouldn't ush it too far myself.