My eyes are old, and I do so love this classic wheelgun.
It turns out that the HiViz GP100 rear blade sits just a bit higher than the stock SS one, and the Ruger Alaskan HiViz front sight needs a tiny bit of stock removal to match the extra height from the rear. As a Knight Commander in the Order Of the Dremel, I felt it was my duty to tinker. Sadly I'll need to make a new rig to carry it, as the <temporary> #3 Uncle Mikes will no longer work without snagging. Pictures of the leather later.