First off, my apologies to Brown Bear for blaming the ammo for FTF and light strikes. After going through boxes of Tul Ammo, Blazer, and Selier & Bellot and having the same problems, I decided to go back to my stock striker spring (I had been using a 3.5# spring), stock guide rod (was using Brownells stainless steel) and stock striker (was using a Glockworx skeletonized striker). Just went through 150 rounds of S&B and Blazer with no problems. I still have the Zev fulcrum trigger and Ghost 3.5# connector installed. So it seems that the guide rod was causing my FTF and the striker/spring was causing my light strikes. Apologies also go out to Glock for doubting the stock parts. While I like the Zev trigger, I would have no hesitation going back to the stock trigger. Live and learn.