I am thinking of doing this to my 642 and 640 pro but am on the fence due to these being carry guns and could be used in a lethal force situation at some point. So reliability and such concern me. Do any of you think that changing these guns from factory specs is a good idea? I ask because I am a firearms instructor and would really like to smoothen out my triggers but this is a question I juggle with in doing anything to a factory gun. Just was wondering what everyone's thoughts are on this..

Of course, then the other side of me thinks that I am issued a glock for duty and it has a 5lb pull so what is the issue then, right? grrrr..