Hi All, I am new to the forum but not to S&W. Been a fan for over 20 years when I bought my first, a 915 when I turned 21. Anyways, I just purchased a used CS40 with the same trigger clicking and was impressed to find this forum which fixed the issue but only temporarily. The play spring seems to be fine, not broke, fairly stiff but fairly easy to adjust by pushing it forward slightly. It is the newer style spring that is connected together. Problem is I can take the gun out and fire it a few times and the problem comes right back. I know it is trivial, not really needed and by not fully releasing you never really know but I am a perfectionist and looking for a permanent fix. My model 915 that is over 20 years old and I have a 5906 that has never had this issue. Just wondering if anyone has seen this problem keep coming back and if there is a permanent solution. Thanks for any advice on this.