Hey, Kyhunter
Yeah, I had counted them up and it was 7, 3 of mine and 4 for some buddies. Between us I had put a kit in all but one of the models, the SR9
The improvements in trigger action actually come in 2 parts.
I am sure you notice the amount of pretravel (distance you pull the trigger back before it begins the firing sequence) and reset length (after the primer is struck, the distance the trigger needs to travel forward until you can begin the pull for another shot again.
After the new reset bar is put in place, the pretravel is all but eliminated (you actually must have some for the gun to function properly), The break is crisp and clear like the proverbial glass. The reset length is very small.
A side note, you may already know this, while pretravel length is easy to determine, to get a definite feel of the reset length, you pull the trigger, keep it pulled, rack the slide, and slowly ease off the trigger until you hear and feel the click of the sear resetting.
The lighter trigger spring and to a very minor extent, the lighter safety plunger spring that comes in the smoothit kit 1 are the main improvements to the actual trigger pull weight.
I did do before/after trigger pull weight tests on 5 of] the guns (2 of the 45, 1 each of the 40, 40c, 9c as I said none of us had the SR9)
I only remember the 45 and 40 numbers because they were the most significant difference. The trigger pull weight decrease on the others were not nearly as much but still noticeable. The compacts seemed to have a little bit better trigger action, but still improved significantly after the kits.
The numbers on the 2 SR45 that I worked on (averaged 10 pulls) were 8.2 and 7.7 before, and 4.3 and 4.1 after respectively. The one SR40 was 7.8 before and 4.1 after. I don't remember the compact numbers aside from that I believe they hovered around 4 also in after testing, but the before was not as much as the 45 and 40 so the decrease was obviously not as much.
Hope this was understandable and not just sound like a bunch of rambling, and that it helps.
Doc