Let me just start out by saying I am doing this to make a safe working gun that is functional, usable, more economical and nice to look at while saving money to enjoy the gun. Yes, I know I could buy a new Italian replica or spend even more money on getting a 100% Colt gun with Colt parts so, please don't bother with the keystrokes to rehash those options. I have found many abused "orphan" guns over the years that have been in poor shape and what I try to do is make them functional and look nice, not to deceive or fool anyone into thinking it is in original condition with correct parts and in a factory finish. OK, I got that covered and out in the open, let me tell you what I am planning on doing. I have an original circa 1920s 1st generation barrel, cylinder a USFA base pin and cylinder bushing and a 1st generation 1920s receiver with the 1st generation loading gate. Welding and other flaw removal for the frame is required along with re-tapping some of the screw holes. There is nothing else I have purchased like the back strap, trigger guard that is original Colt for this build as it would far outweigh an already time and expense consuming project to get original parts. My question is, what parts from either of the Italian gun makers like Pietta and/or Uberti could be fitted to a Colt SAA frame and barrel? I know with Uberti I would have to get a hammer and trigger that doesn't have the retracting firing pin. Would a Colt hammer and trigger really be necessary or could I use one of the clone makers parts? Is putting in a coil spring for the hand better than the original Colt style flat hand spring? How about the Italian small parts like screws, ejector assembly/housing, trigger guard/grip frame. backstrap and Uberti wood grips....can they all be fitted by hand? Other small parts like the hand, mainspring, bolt and other springs? I plan on hardening any Italian parts like the screws and installing Woolf springs where I can get them. Any answers to these questions will be greatly appreciated. My thanks in advance and I know in the end I won't be saving a king's ransom, but every bit can help the project.