This is my take on a hommade incubator. Third batch of a dozen eggs. Not so good fertility though. I get one chick each batch. I made this with stuff i was gonna throw out so ill call it free except for the thermometer 12 dollars. Waiting for my chick to hatch. It pipped last night at suppertime and hasnt made any progress. When do i step in? Thats like a 12 hr pip.still shaking.