Jim,
You should add "moving parts" to your list.

SC,
This'll be my first year bowhunting, so I can't give a hunting example, but I tried mechs first, and had a significant problem with the blades deploying on release. I say significant because two out of six did this, one on its first shot and the other on its second. The second one cost me $105.00, but it was my fault for strapping my target on top of my mobile water hose cart.[:@]