Just because a bow is in center shot does not mean that it is tuned. A person does not draw like a machine due to body conformation. Most people will shoot better when not on center. Center shot is only a starting point, that is where I feel that group tuning by bare shafting comes in. It tells me how I am shooting the bow and not a machine that pulls the bow back for me to align it. Bows must be conformed to the person and not the machine. I think that I have beat this subject up enough. Good luck to all of you in the upcoming archery season.