Now when you take into account the entire tuning process you have properly spined arrows, Center shot, nock high or low, type of rest, spring tension on the rest, fletching contact, vane or feather, length of fletching, right or left helical/ offset or striaght fletch, cam lean, diameter of the arrow, FOC, length of arrow, speed of arrow, tiller, string strech, peep movement, type of nocking system, human influences, ...................... Any one else care to add something?
Probably not (nothing more to add), ---good post. I think that the human factor or what I would call form consistancies could be number one on the list though.