I've been using a cow's knee but yesterday I walked up on a buck at 20 yards. We saw each other at the same time and I pulled the cover off to shoot and he was a bouncing tail by the time I got the gun up. I want to find something that works that I can see the sites through. I was thinking maybe wrap the frizzen and pan in saran wrap loose enough that it won't block the sparks from dropping into the pan. What do others do?