My Leshiy stopped firing, just makes a slight hiss. The valve stem is aligned in the center of the opening so the trigger blade doesn't engage it. I have replaced the ball and the part the ball seats into. It still lines up a little right of center instead of the left side of the oval opening. The stem is not bent, I don't know what else to check. Edgun west wants 300 bucks to look at it, I ain't paying that! Any suggestions from the experts here?