On a previous re-build, the previous owner installed a set of double set triggers and a new lock. If/when I get around to re-building it, the rifle will get the lock replaced with a flintlock, and the triggers returned to just a plain ol' trigger. Set triggers have lost much of their attraction for me over the years.
Now that I think about it, I also need to plan on replacing those stupid tacks that look like flowers, and replace the cheekpiece inlay (currently a 1900s silver dollar won as a prize in a state match long ago, by someone I never knew).