Don't have a camera at the moment, sorry mine broke. I may have one tomorrow, we'll see.
Anyway, just take an egg carton, I used the 18 egg size. I took a large bread knife and cut off the very bottom or each of the areas the eggs sit in ( take off as little as possible, just so there is about a quarter sized hole in the 18 bottoms ). Now, cut the top off the carton. Instant egg holder. The reason, this may help you visualize, you cut the bottoms off is so each egg can get air flow around it. I use the pressed paper kind of cartoons. Others had said the styrofoam ones are not as good. By using the carton to hold your eggs you can tip the whole incubator instead of turning each egg. You do have to use a sponge or paper towel for humidity or your water will spill when you tip the bator.
A picture is worth a thousand words, but I hope this helps.
Bob