Have you seen the Skinner peep sight? It's a little more expensive but they are ROCK solid!
Nice! As I was clicking on the thread, I thought about all my various .45s I enjoy woodsbumming with. Two of them are H&Rs: a .45/70 and a ca. 1972 .45 Huntsman. I've been meaning to get a WGRS for both, or I might just make my own peep sight for the Huntsman.
"An armed society is a polite society."