My LvL 10 bolt just broke in the other day, so i put a smaller sized carrier in it and it worked fine. Then after a while the bolt was sticking to the main body, and it would not shoot a ball. So i called AGD yesterday, and they told me that the LvL 10 bolt is bigger than the LvL 7 bolt or sumthin like that and that i should file down the LvL 10 bolt to make it shoot a ball. What do i do???