1) Yesterday I shot at a small doe and missed. I think the arrow just touched a twig. As I examined the arrow I noticed a small dent (aluminum arrow) about a half inch long but not deep. The arrow is not bent at all. Do you think the arrow is still usable?

2) My quiver attaches to my sights which attach to my bow. For some reason I cannot get a tight attachment to the bow - which means the who thing lightly wobbles. It is annoying as I am always bumping it whe moving around. There are two screws to hold it which are tightened with an allen wrench. Is there anything I can put between the bow and the sight/quiver combo to tighten the hold. It seems the gap is about 1/16 of an inch.