Have done a few with great success, some I wish I could have done better. I have a couple Colt style percussion revolvers I intend to tackle once I've retired, which involves installing a taller blade style sight that sits in a groove parallel with the barrel. I have the brass stock on hand now. Lessons learned over the years include doing as much research as possible before beginning, never work in a hurry, be prepared to put something down and walk away for a time (amazing how effective that can be), don't take on something greater than your skill set and tools are capable of.