my name isn't Jack Weigand but...
I got a Wolff spring kit for my Security Six. The hammer spring was actually heavier than the factory spring and made the trigger pull worse, so I replaced the factory spring. The trigger return spring, however, was lighter, and did ever-so-slightly lighten the SA pull. I had zero trouble installing it, I found the dis/re-assembly of the trigger group quite simple compared to some others. I have had no functional problems as a result, nor do I see how such a thing could happen.