Anyone have any experience with this item ? I've seen it advertised in Shotgun Sports, and the November/December issue of Shooting Sportsman magazine had a favorable writeup on it. I'm not a gunsmith, so it's not essential to my livelyhood; but I do own and shoot a number of shotguns so it would be a "nice to have toy". I called and talked to the Robert Louis Co. who makes the item and was satsified with their explanation of how it works, and their web site is very informative. Thanks to anyone with any information.