The instructions DVD that came with mine wants you to round off the sharp edge of the sear. It wasn't clear on how to do that, I just used a file. Sounds like you may need to tighten the red color weight of pull spring. It's also not clear about adjusting the sear engagement screw. You simply turn sear screw in until it releases the sear, then back screw out about 1/8th turn with locknut tight.