Any thought to trying Carry Optics? Last year I was looking for a project. Found a TZ75 pre-88 super cheap. Installed spare parts I had on hand. Extreme delta hammer, extreme disco, small frame extreme firing pin, and long sear. This combo provided the best trigger pull out of all the spare parts I had. Polished it all up, put in all new springs to include a 13# CZ hammer spring and VZ grips for a CZ 75. Then when looking for sight options, which were slim pickings, I just decided to go a different route and had the slide milled for a red dot. Problem solved.