I've considered doing something similar with my 1894... but have 1 troublesome scope base screw I might need a gunsmith to help remove. I do like the XS front sight post... but understand the low light issues...
Are you a thumbs up or down with the entire xs rail/peep combo??
I dread the thought of a 3' stick (obvious exaggeration) of "rail" on any gun, ever, at all, BUT the thought has sort of crossed my mind for the Contender Carbine to leave the option open to use peep/dot/scope. Not that I'd have them all mounted at the same time, but I PREFER the peep whenever possible, LOVE that little low-powered variable for
most situations, and am leaning hard toward a dot, especially after the comments on this thread.
My main objective in going to the dot would be to cut down on clutter on the little carbine, but I see a lot of benefit in the dot otherwise too. A great deal of the "serious" shooting I do with that gun is under less than ideal lighting conditions, USUALLY closer than I'd prefer to be, and has to be QUICK.
The Rossi 92 I had came with a scope base contoured to the barrel and there were D/T'd holes for it hidden under the rear sight. This required a pistol-scope, but it put just a little mass forward of the middle on the super-light 16" carbine, which I find ideal, and it allowed me to leave the peep base mounted. I did not like having a scope on it, but the peep did not work out as well with a flashlight as the scope, but if you had light BEHIND you, like a porch light, the scope was not so convenient anymore.
I keep coming down on the side of the "dot" the more I roll it over in my head.