You do not center your pins in the No Peep. It works as an auxilary sighting device.
In essence you set it up just above or below your pins so that in your sight picture, you can see your target, pins and the NoPeep. You like up the rings that you see through the sight to make a bullseye (concentric rings). As long as the rings remain concentric, you are good to shoot. If your anchor point is not correct or you torque the bow, your line of sight through the NoPeep will be off and the rings will no longer line up. Below are some pics I snapped of my NoPeep. Also I am a Lefty so for all of you rightys out there the NoPeep would be flipped over with the round part on top and the flat on the bottom.

My camera seemed to want to focus on the front edge of the NoPeep causing the black ring to look fuzzy in the images. I assure you, it is bright and very clear when you are sighting with it.




This image shows what the rings look like when at the correct anchor point.

You can see, although dim because of the flash, the misalignment of the rings/dot. This is what you see when you torque the bow or botch your anchor point.