I hope this is the right location for this question. I'm thinking of getting a brass catcher for my AR and have a couple of questions for the more experienced: 1. If you have used one, how do you feel about it? In other words, did the balance of the AR change as the brass was caught? If yes, did it affect your shooting? 2. If you have used one, do you still or would you again? 3. Which one would you recommend, if any and why? Hey, I know they're cheap and I'm probably over thinking the problem, but I'm an engineer by profession. It's what I do!