Other than the layered block-type targets, what's a durable material to shoot BH's into? I borrowed a Carbon Block from a friend. I only shot it five times, each time I pulled the arrow out there were chunks of the material coming with it. I stopped shooting his target because I didn't want to tear it up any more. It just didn't seem to be very durable. I've been looking at the Carbon Buck, but I haven't heard any reviews on it yet. How well does a bale of hay work? or styrofoam?