Primary Duration Vs. Secondary Duration?

[TimAikin1]

I'm making my first Dunkel from a Brewer's Best partial mash kit. I'm wondering if I should just leave it in the primary for the entire time or split it into a secondary at some point? Is there any benefit/harm to leaving it in Primary longer and doing shorter Secondary? Or shorter Primary and longer Secondary? I'm making this batch in a FastFermentor, so the "labor" of going from primary to secondary is as easy as opening and closing the valve at the bottom.

Thanks in advance!

 

[BobBailey]

Unless you're planning to dry hop, add fruit or bulk age, there's really no reason to use secondary. That said, When I fermented with US-05 I did find that it dropped clear much faster after racking.