Is the Ghost Ring Aperture different from a Peep, or is the Peep more like an Aperture, while being less like a Ghost Ring; alternately, are the Ghost Rings and Peeps interchangeable even if the Aperture is not applicable? I think the Peep and Aperture are superior to the Ghost Ring, although I have no basis for comparison, since nobody can give a definitive definition for any of them that does not overlap the definition of the others. The best analogy that I've been able to come up with is: Peep is like Rock, Aperture is like Scissors, and Ghost Ring is like Paper, but only when they're not, and even then only on Wednesdays (I.e. Opposite Day). Then again, the PeepApertureGhost Ring trumps them all, but only when it doesn't. I'll tell you one thing for sure, it's making my head hurt. So long as you can Peep (look through) the Aperture (hole) in the Ghost Ring (hole that is there, but really isn't) you'll be fine. I'm just going to punch a hole in a piece of cardboard and tape it to my leaf sight because I'm going through an existential crisis right now about God, Holes, Guns, and ultimately, dare I say it...Zombies!!! Duhn't, Duhn't, Duhhhhh! Head for the hills!!! LOL.
In all seriousness, thanks for the info on the interchangeability Obi.