That's a good 2-cents worth db. Many other folks can too, but I can say that just a hammer spring change has worked wonders for all mine. The 9-pound has really improved pull in the center-fires and I even stuck a 11-pound (stock) hammer spring from the 327 in the 941. Not a single FTF on any of them yet.
I really wish the Wolff trigger springs would slip in place and function, but they won't, at least they won't in mine anyway. Both the 9 and the 6.5 coil-bind before DA action cycles through. I realize it would not take much grinding on either trigger spring....I just hate to cut one up and I wish Wolff would produce a reduced spring that would slip right into these small frames.