To incubate horizontally or vertically?

[Sickemtiger]

This is the incubator I'm using btw. I'm still undecided about using the turner or not because while it is only barely rocking them (20° one way, than upright) I thought it's better than laying them on the bottom and leaving them overnight unmoved? Wouldn't the slight rocking be better than nothing? Of course I'll supplement it by manually turning 3-5 times a day, but at night I wouldn't be turning them.

Unless you think I should? Maybe I could turn them once throughout the night for the first 7 days?