TFOX. there is a website that calculates everything for you. You put in the fletching info. Arrow weight and length, tip weight etc. and it spits out the drag co-efficients etc. It is kinda interesting even if a person never uses it. Your are absolutly correct. Every thing that you mention has its part in arrow flight. Whether it is neccessary to the average archer, probably not. But it gives us something to think about when we are not hunting!!!!