Im trying to build my own archery target. I know there´s alot of talk about the materials that can be used to go inside as the stuffing... Cardboard, old clothing, old sheets, foam... I even came across "plastic" one time. The thing is, I´ve also read that there are some things that, with time, can damage the arrows or even bend them. My question is, what´s the best? What are some "dos" and "dont´s"??