Dry firing is about muscle memory. It's like Tai Chi is to martial arts. Get the movements correct at slow speed and you will have good form at full speed. With a 1911 you can practice clicking off the safety as you prsent the weapon and clicking on as you retract or go to low ready. Then when you get to live fire the safety action won't even be noticed, it will be automatic. The up side is that in a self defence situation you will fight like you practice.