Just by eyeballing and manually moving metal sheet between heavy wheels. That is how they make compound curves for luxury cars and planes. https://www.tinmantec

Just by eyeballing and manually moving metal sheet between heavy wheels. That is how they make compound curves for luxury cars and planes. https://www.tinmantech.com/gallery-of-metalwork/wheeling-machines/other-wheeling-machines-2.php https://www.tinmantech.com/gallery-of-metalwork/wheeling-mac...