Experimenting, changing things, helps me to learn. Speaking of broadheads, for instance. Suppose you get a new BH and put it on your current arrow and shoot it out of your current setup and it flys differently. While looking into that you find out something new about your setup, something that may help you improve that you didn't know before. The way I look at it is, if you never change things, even if you ultimately end up using the same stuff, then you lose opportunities to learn something new.