slingshot types

Hey guyz! I have an interesting question, or maybe its interesting only for me. There is 2 types of band attachment with different bands. Type 1: http://i49.servimg.com/u/f49/17/19/45/49/badoqu10.jpg Type 2: http://blog.tinkeringmonkey.com/wp-content/gallery/slingshot/7_done_whole.jpg Type 1...