I have a G17 I am setting up for IDPA. I have installed a 3.5 GLOCK connector and completed the .25 trigger job (plus the AnarchAngel's action enhancements). I also added the GLOCK extended slide and magazine release, along with Warren Tacticle Competion sights. I plan to leave the stock trigger spring, and the stock recoil rod/spring in the gun. Now for the final mod, I want to lighten the firing pin spring a little, to bring the trigger pull down just a bit more. The IDPA rules say the internal parts have to be factory stock, but can be modified to enhance trigger pull. So my question is... can a clip a few turns from the stock firing pin spring to bring it down about a pound (midway between the stock GLOCK FP spring and a Wolff reduced power FP spring)? If so how many turns to start with. Again this G17 is a race gun and NOT FOR SELF DEFENSE. My stock G23 duty gun (with NY trigger #1) fills that role. Thanks.