the thing is about the 4 lb spring... the trigger gets a little mushy if that's the only thing you change and whether you change to a heavier trigger housing spring or staying OEM won't make it better. What I've found that affects "crispness" is the overtravel adjustment. There is a sweetspot between too little overtravel and too much i.e. OEM that affects the way the striker break feel. If you get a shorter pretravel housing in addition to overtravel adjustment, that's when the holygrail of Glock competition trigger appears. Also not all striker springs exhibit the same vibration after a striker breaks. Glockworx has long springs that coil bind both at spring cups and at base which yields the most vibration when the striker drops. Wolff is better and Vanek's milled and polished spring (coils look squared) has the least vibration and most perceived "crispness".
Thank you for the info. My current set up I plan to install this weekend will be as follows: Wolff competition spring kit, lone wolf adjustable overtravel ejector housing, jager polymer guide rod with either a 11# or 13# ismi recoil spring. I plan to polish all the stock internals and then I figure i'll go from there. Is there a way to shorten the pretravel and still be ssp legal ? Thanks again for the input.