For what it's worth, I bought one of those generic laser bore sighting kits and what a disappointment it is. I got it yesterday and put the .45-.55 caliber arbor into my Traditions and then I tightened it down and attached the laser unit to that. I immediately noticed that at 11 yards (inside the house) it was way off. I mean the barrel was pointed right at the target, a paper plate, and the laser was pointing off of target by about 7 inches. I read the instructions and found out that the laser also needs to adjusted by 4 allen screws to sight it in![:@]. So now I have to sight in the laser everytime I switch arbors.... So after much frustration and repositioning the thing a few times I've concluded that I wasted $40 and that looking through the bore at that distance has worked better for me in the past. The first time I did it that way I hit that paper plate at 25 yrds, albeit a bit low. There is just no substitute for plain old sighting in. Boresighting is just to get you in the ballpark.