Our local Parks and Rec department put on a pumpking chucking contest one year, so of course we couldn't resist. There were about eight different members who worked on this project at Vector Space. My contributions were to help build the frame and to make the end cap for the throwing arm. But most importantly, I figured out how to transport this thing.
The design came from this brilliantly written Instrucable. So thanks to skull_mech for helping us destroy the competition.