That photo wasn't the one I was thinking of but it's better because the one I had in mind was based on chickens. I found it HERE
I'll have to add that link to my links page.
I personally don't get too worried about how I turn my eggs, I put them on a shelf-liner cut to fit the incubator so I don't get any 'brain damaged' eggs if they accidentally get dropped (my niece was nice enough to turn eggs for me once when I had to leave town for a funeral and when I returned she'd left a note that I might have brain damaged ducklings because she'd dropped a few while turning) and try to turn them an odd number of times, 3 or 5 times a day. (You have to watch with the shelf liner because there are some that seem to break down in the incubator and release a chemical smell, a type of off-gassing I assume.)
Opening the lid mimics what occurs during natural incubation when the duck gets off the nest for her daily ablutions. The misting does add a bit of humidity and also mimics the duck getting back on the nest after a bath & preening some of the moisture from her feathers.

I'll have to add that link to my links page.
I personally don't get too worried about how I turn my eggs, I put them on a shelf-liner cut to fit the incubator so I don't get any 'brain damaged' eggs if they accidentally get dropped (my niece was nice enough to turn eggs for me once when I had to leave town for a funeral and when I returned she'd left a note that I might have brain damaged ducklings because she'd dropped a few while turning) and try to turn them an odd number of times, 3 or 5 times a day. (You have to watch with the shelf liner because there are some that seem to break down in the incubator and release a chemical smell, a type of off-gassing I assume.)
Opening the lid mimics what occurs during natural incubation when the duck gets off the nest for her daily ablutions. The misting does add a bit of humidity and also mimics the duck getting back on the nest after a bath & preening some of the moisture from her feathers.