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Thanks for the clarification; I actually should have dug through the thread because the answer was there. It's an easy change to bungee cords.

Help! I have an urgent question before regionals this weekend. I'm a coach for a B-division team, and we are having a rules question. We have essentially built a trebuchet, but are wondering about this: "3a) The launching force must be supplied by non-metallic elastic solids such as rubber, woo...