Hey all! Undergrad in M.Eng here, building a desktop robotic arm (<12 inches tall, arduino board) for a personal project. I've been looking at materials, and aluminum and wood are both doable, but if possible I'd rather use a lighter material that I can cut without machines, such as a strong cardboard or cardstock that could be cut in sheets and designed to be structurally secure. Does anyone have experience with these materials? Any recommendations for what type to buy or where?