That looks pretty good! How well did it work? I’ve never done sandcasting or any foundry work, I’d probably want to start with something simpler than this though. I understand the problem of minimum quantity, I’ve been getting told the same thing- the fewer the parts, the more expensive each one is, especially for Cnc. I’m looking into adapting my design for a three axis mill, rather than five. This is why I asked earlier why you don’t make it as a kit? That way you only need to supply the specialized parts, and let buyers choose their own wheels, tires (deck?) etc.