This is my first incubator hatch. I am using egg cartons, same idea. It's much better for shipped eggs to stay fat end up. You should be fine with the turner, I just hear it is messier and would imagine a bit uncomfortable for the chick once it is out.
If you decide to swap for egg cartons be sure to cut the bottoms off (beter air flow to the egg) and trim down the tops so the chicks cam wiggle if they need to.
I have never used the turner in lock I have used egg cartons ...
Someone did say awhile back a chick got its leg caught in the turner while others were hatching so I think an egg carton with the bottoms cut out as Chick said .. would be better for you
.No danger of a problem .Lockdown is stressful enough!.
If your temp was very close to 99.5 the whole hatch(VERY CRITICAL) and your humidity around 30-40 and lock 65 It probably wasnt you
Sometimes if your eggs are shipped you dont have a good hatch at all... Keep trying eventually you will get some
%on shipped is low 25-50% usually Sometimes zero.!!
I know it happens to me too...but i keep buying eggs from ppl far way i cant find here and hope for a few.
.Its a BIG gamble though Local or your own is best.85-90% hatch