I recently purchased the spring kit for my CZ P-07, the installation and polishing video were spot on, easy to understand and easy to see where the parts went. The trigger pull weight went way down, on my manual Wheeler weight measure the double action pull was off the scale, probably 10-12 lbs., the single action pull was about 5 lbs. After your kit was installed the pull weights went down to 7 lbs. and 3 lbs. respectfully. I love it…
I had an issue at the range though with several failures to fire. Was using good ammo, checked all the standard issues, firing pin cavity, and cleaned spring and pin well, but 2-4 rounds from almost every magazine had light strikes. I even replaced factory springs in the slide with no effect. I saw someone else mentioned an extended firing pin from Cajun Gun Works. Their part #61050 Extended Firing Pin, its currently $25.00 They say with the lighter springs and hammer spring, you may need this for reliable ignition. This did the trick, after installing this I have had 0 issues. I love the end results......would have been a perfect "5" stars if Mcarbo sold an extended firing pin