Create a 3D printable model of Darth Vader exactly as seen in Star Wars, optimized for FDM printing. The model must be watertight, with clean topology and no mesh errors. Armor, helmet, chest panel, belt, boots, gloves, and lightsaber must match the original design precisely. Split the model into modular parts: head, torso, arms, legs, cape, and lightsaber. Use simple geometry for small details like buttons or grooves to ensure printability at 0.2mm layer height. Limit overhangs to under 45° and avoid thin parts. The lightsaber blade should be detachable. Cape should be a separate part with minimal folds. Final output: STL, print-ready.