Just got this new sight. I love that it's all metal and that it comes with a ghost ring, but it wasn't an easy install. My question is how to I adjusted my POA to POI? I havn't shot it yet, i'm just trying to get an idea that way i'm not out there waisting expensive ammo. Also should i just the ghost ring or stay with the normal rifle sights. This sight when on a Remington 870 supermag (bonecollector) with an IC choke. thanks for any input. Jared