I'd be interested to know how hard the install was as well. I am not very mechanical. My son, who is very mechanical, could do it for me, but I like to try things myself. Also, he said that if the trigger pull is reduced to between 3.5 and 4.5, that I would be playing with fire in a sd9ve because there is not safety. He does know more about handguns than I do, being a handgun novice, but I told him that I won't be putting my finger on the trigger unless I am gonna shoot, so it shouldn't be a problem. He seems to think that dropping it or hitting it on something could cause a misfire. Any thoughts?