What's the best peep sight's you all have found. I have the Ghost Ring Setup from Wild West Guns on my 450 Marlin, and while I like this setup. I think the peep hole is way too large. I believe it's .187 or there-abouts. Do you all know of any with inter-changeable peep holes? Or maybe some of you have come up with your own solutions. What's your opinions?<P>Phil