Honna, These guys have covered it well. But, I was thinking first of what type rest are you using? Is it a drop away?
Second: do you know how to check for fletch contact, or what powder testing is? Don't want to insult your knowlege, I just understand that in reality archery knowlege seems to grow slowly and archery is growing rapidly...therefore only about 1/4 of us know most of this stuff. The rest just haven't had time to learn it yet!