Good job & great pics! I swapped out the spring in one of my 452 Americans. It made a huge difference in pull weight + made the little bugger much more fun to shoot. I haven't had a light strike or a 'dud' since changing the spring out... think I'm good to go. I used a YoDave trigger kit from a guy on RimfireCentral. I keep looking at the shims wondering how much benefit I'd see by using one.
A day without recoil is like a day without sunshine!
S&W Club #43