Oh gosh...I've hatched so many and now I have a turner...best I remember those were shipped eggs and I got like a 50% hatch...which is AMAZING with shipped eggs! Hand turning works better than the turner IMO, but I am NOT turning 40 eggs 3 times a day by hand
I'm a hatchaholic...so I'd get carpal tunnel hand turning now
I am turning my marans eggs by hand right now because I have two bators going and the egg turner is in the other one. I am doind 3 x's a day. Hope that will be enough.