If that's for me as far as centering the housing, I want to see more of the pin while shooting at 100yds. I'm pretty good now, 20 is toward the top of the peep and I had plenty of pin to see at 88 earlier today. With my fixed sight, the housing was centered with the peep and it was like another way of ensuring my anchor was the same, especially at step up and down hill shots up here.