So I had great success with my Springfield 1911A1 mil-spec. Harrison retro TR ignition kit and XD hammer strut, XD thumb safety, and a colt sear spring. Shot 200 malfunction free rounds today but just wanted to ask, I have already adjusted the colt sear spring quite a bit forward and I am just not getting a stronger pull that i am after but I am just doing it by hand for the first time. Can I just use my factory Springfield sear spring, that gives me the pull i am after but with either sear spring the weapon passes all safety function tests, i am probably just not used to such a nice crisp pull. I fit the thumb safety and Xtreme duty trigger set screw no problem.