Although I choose to use 3.5# connectors in my Glocks, I'm aware that, should I be involved in an accidental shooting, my choice probably would be used against me in a civil case. If I'm involved in a justifiable shooting, considering that I'm in GA, I don't think the fact that I'm using a modified pistol would come into play.
When I'm making decisions that involve potential legal problems, I take my Ol' Daddy's advice and seek the advice of competent lawyers, rather than advice from gunrag writers, etc. I've discussed this very situation with several lawyers, including a friend of mine who is a Superior Court Judge who practiced criminal defense law for several decades, prior to his becoming a judge. I guess the fact that the judge asked me to install a 3.5# connector in his carry piece and that I polish all the metal-to-metal surfaces of the firing mechanism pretty much reflects the judge's opinion on this subject.
One little piece of advice that just makes sense to me would be that, in the event one is involved in a self-defense shooting, if you say anything at all to the investigating officer(s), don't tell them that you accidentally shot the perp.