I use cartons in my turner. You don't need to cut the bottoms out, they hatch fine without it. I hatch with the 18 egg cartons propped on the wall so they are at a 45 degree slant. Eggs are not upright but they don't roll around.
Also I use the rubber liner for shelves that looks like net to line the bottom of the incubator. $1 stores usually have rolls of it.
Also I use the rubber liner for shelves that looks like net to line the bottom of the incubator. $1 stores usually have rolls of it.