NOD SOLUTIONS DESIGN GUIDE: Bridging the Gap Between Affordable 3D Printing and Expensive Metal Molds 2+ Piece Rigid 3D Printed Molds - Flexible & Semi-rigid Casting Materials Most companies validating a new part face the same bad choice: spend $20K–$50K+ on steel or aluminum tooling before they know if the part actually works, sells, or fits — or spend months hand-finishing FDM prototypes that don't tell you anything about how the part will behave when it's actually injectio