This is a conversation that is ever reoccurring. My stance continues to be that if you have a good lawyer, what you have done to the handgun should be addressed by the attorney. For example, you put in a lighter trigger, then the attorney needs to be ready with an explanation on why being more accurate with your shots is desired and more responsible. However, with the lighter trigger, one serious consideration as to its benefit is the fact that in a stressful situation, a 6 pound trigger may feel more like a 2 pound trigger. That is to say, you may be pulling off shots when you don't intend to because fine motor skills go out the window under stress.
Lastly, there are SO many "You should never xxx" and "The prosecutor will use xxx against you". Regardless of what you do, you are pretty much screwed one way or another if you ever have to use your firearm in self defense.
Fly