In the video @ 3:54 you can see he has a Universal Decapping die and then a Sizing and Decapping die next.
https://www.youtube.com/watch?v=SDIObEsTPxg
I understand the first die decaps. I understand the second one resizes and lines up for the primer. But my question is why wouldn't you Size and decap on the upstroke and then prime in the downstroke on the first station? Seems it setup this way is wasting a die spot on the turret.