Bought a 59 hammer and strut a few weeks back. I finally got it to the grinder to shorten the spring strut, then rounded the end with a file to a good copy of the original. After much wrangling, got it back together, and all feels good. Checked with a magazine of snap caps, and single action seems the same, a long creep then a crisp hammer drop; double action also seems the same - a long steady pull with no stacking then "snap". Safety decocker works the same, as does the magazine safety, so nothing has changed. Going to the indoor range next weekend to check it out. Always my best shooting 9mm, now I may like it even better.