Could be an inch or two at 20 yards. At 30/40 yards, lots more. At target type distances for 3D and field archery, it makes a BIG difference. I just bought a Medicine Stone bow vice that does 2nd/3rd axis tuning and while they are expensive, it's one of the best tools I've bought so far. My thoughts are to gain every advantage possible that I can thorugh the tuning of my equipment. For something like this that is fairly easy to do, why not?