If you are having issues with the trigger being a bit too heavy... do a main/hammer spring swap. Its actually very easy, and a cheap upgrade. You just push out one pin and swap the spring. A #14, #15, or #16 spring are good choices. You can get a spring kit that has several different springs to try for about $15.
This video gives a basic how to on it.
http://www.youtube.com/watch?v=DjtrGaQUIHk