I bought some "J" & "N" frame adjustable sights from Gun Parts Corp. in 2006 for around 15 bucks each but I'm saving my last "J" frame sights to put on a Smith project. That's why I used the Taurus sight, which being metric, is .020" narrower than the Smith sight. I figured if I screwed up while milling the slot, I could get a second chance by using the Smith sight.
That was clear as mud. Anyways it was a pretty straightforward project: mill a slot, drill & tap a few holes, and "Presto!" a Vaquero with adjustable sights.
Two weeks ago I couldn't even spell gunswith, and now I are one! (NOT) More like I've been an amateur machinist for ten years, and I've gotten where I'm not afraid to make a mistake on my own stuff.