I think the error in your assumption comes, in part, that there’s is tooling set u for mass production of each part. A lot of parts are hand-fabricated. The se

I think the error in your assumption comes, in part, that there’s is tooling set u for mass production of each part. A lot of parts are hand-fabricated. The setup may take time but it’s not necessarily like a assembly plant that requires new dies on each design.