Raymond, thanks for the great write-up. I have bookmarked this page and continue to review it. I recently picked up via PPT a new 'used' 870. It is the 18.5" front bead sighted Talo edition. It came with a receiver mounted UTG rail and a low cost reflex sight. For various reasons I have decided to remove the mount and move to a more traditional sight setup. In its place I added a 6 shot side saddle (not totally happy with this either...should have sprung for the Mesa Tactical). I will be using this gun for simple HD and slug shooting out to 30-50 yards and think what you have done with the LPA and HiViz sights is perfect for my needs.
So I have a couple questions if you don't mind. First, what barrel did you start with? Judging from your pictures it looks like it was a traditional ramped bead (like mine) that you ground off.
Lastly, when you actually tapped the receiver for the LPA ghost ring sight did you do that by hand or with a drill press mounted tapping machine?
I had this post all setup with links to pictures but being this is my first post I was not allowed to add links. Next time
Thanks!