I've hatched plenty of corns in the past, the spotted pythons I hatch now are definitely smaller. I'm not saying some corns can't be as small, but I've never hatched a corn myself that couldn't take a day old mouse pinky, I have had a few spotted pythons that couldn't.

I don't put holes in my bins for my RB68 baby rack either and have not had trouble with them not getting enough air. I think some people may drill small air holes in them, I don't though and have not had problems because of it.