I have a homemade styrobator. I'm on day 14. I candled the eggs and some look more like day 10 development, others look on target, and a couple look day 18 or so. Anyone else had this happen? Just curious if it's common or has something to do with temp maybe? I've read that eggs develop slower at slightly lower temps. The light is in the side of the bator so the eggs that are closer are obviously warmer.