I've always had the impression that James is too wasteful, overengineering, printing massive, impractical plastic things that actually don't need proof they will work because they have precedents, like circus clowns walking on big balls in this case.<p>Now, seeing all the effort he goes into explaining what he's doing, how, why, and him open sourcing CAD and code, I get it. This is wonderful teaching for product engineers, and while James understandably has to teach sure-fire projects because he wants sponsors to stick, his viewers can use the learning to try riskier projects.