I recently completed a PSA 556/223 build with the EPT nickel plated trigger. I have seen some YouTube videos on the improvement JP's reliability spring kit has made without causing any issues. Most claim that the trigger pull went down from @ 6lbs. to 4 to 4 1/2lbs. The spring kit only cost about $11 plus shipping, which doubles that amount. Any of the members have this kit installed on their AR's? Please share you thoughts, and experience.