By the way, with some experimentation and LOTS of vermiculite, my HovaBator is currently holding 3 large clutches of ball eggs, and I think I can get another one in there, too. They're doing great. I'm going to sort them out later by hatch dates so I don't have any too close to each other--don't want to risk mixing up the hatchlings, lol.
There's actually plenty of room for them.