Ok, I've been back at the range for a while now, and using the Mantis X with dry fire. My groupings are getting better. This is 10 and 15y respectively. I'm still low left. I'm finally taking some advice about the ball and dummy drill and working it in. I've been hesitant because I don't get the objective. It show that I still flinch a little during the trigger press, the Mantis does not pick up much in dry fire, so its a live fire deal. Is the objective of ball and dummy to just embarrass yourself until you stop doing it? I was doing it with a 5 yard target and it seemed to just point out my flinching. I went through 8 mags, 17rnd, with 4 to 5 dummy rounds in it, then went back to shooting and didn't notice much of a difference in grouping. I know it's not magic and will take time to "work" but I am not sure how it is supposed to help.