So I have a gen 3 G17 that I am in love with. Now I am thinking about having some work done, and I have a few questions. First, what are the pro's/con's of having some trigger work done, who would I send it to if I wanted work done by reputable people only, and how much can I look to spend on one? What are the pro's/con's of replacing the guide rod/spring? Is this a straight drop-in upgrade, or does it require fitting in some cases? Does this affect the reliability of the Glock in any way? I am also considering buying a Storm Lake barrel, mainly because it appears to be a straight drop-in situation. Are their products considered to be good quality? I was also considering using the G17L barrel, will this work in my gun? Thanks in advance for any help.