Interesting project and comments made here all seem good to me. I've ended up doing all of them (and more) on one gun or another (like most everyone else here). Still, maybe you've done this, but the first thing I would do is pattern the gun at the distances I'm shooting and I would test it to see where it's point of impact is too. I wouldn't just use paper either. My personal preference for the last point is to have at least 10 or 20 shots at station 7 in skeet to see what the breaks are like. All this will cost you is some shells and some time. You will learn a lot about yourself and your gun and you can make changes that fit how your gun shoots. Fred