I just installed a spot-hogg sight which is similiar to yours. I shoot a hunting size peep and can't see all the white outline of the pin guard either. I just try to line up centered the best I can by moving slightly left, right , and up, down until I figured it's centered. You'll be able to do it very quickly with pracice. I love the improved groups I'm getting. As far as the level...I keep both eyes open and level the bow first before I look through the peep. I think the level is a gimick anyway for hunting.