Hello, I am looking to add a manual safety to my P320 i am soon to acquire. I have seen the MA compliant models and i want the safety but i want it on the X-carry frame and have it pre ordered. I am wondering if it is possible to add one to an existing FCU. Also is there anywhere to acquire the part? If anyone has any experience with this i would really appreciate it! This is going to be my competition gun and the safety gives me a comfortable hold with my thumb and i like the piece of mind for drawing fast and avoiding glock leg. Also im definitely willing to pay anyone who is able to do the machining work on the frame to get it to work. Thanks!