I got my stock sight off last night, but don't know how the sight fits into the dovetail. It seems that when they packaged my sight, and they included an allen wrench to tighten the set screws, they forgot to check if the allen wrench would actually fit the screws. The Wrench is one or two sizes too small.
I haven't had time to dig out an allen wrench. When I do, I will let you know how it fits.