Well, with my hatches the first several do fine, but then once they start moving around they roll the pips and it seems like most of the ones that get rolled after pipping I always end up assisting. I do have a fan and I like the nice even heat. Maybe I may see about wiring a dimmer switch to it so I can slow it down in my new build. After this hatch of chickens and a run of turkeys next I plan to retire this incubator. I can't believe it survived the 1200+ degree temps when I had the fire. It looks pretty rough though, so I want a nice looking one again.