I had an Uberti 1858 Remington with the mellenium finish.
Took a hacksaw..
was the hardest thing to do...
and cut the barrel down to 3 inches.
I then took it to a local gunsmith to have the front sight put back on.
Then came the R&D 45colt conversion cylinder, and the Kirst cylinder pin catch.
I haven't rounded off the grip. 45colt is a bit stout in the little beasty, and I figure it might jump a bit more with a birdhead style grip.
All in all, it works like a jem.
here's a picture, see what you think.