I am developing a small electric vehicle and I need a gearbox that is truly affordable, exceptionally lightweight, and easy to maintain. The focus is on a compact, modular design that can be produced on common desktop FDM printers. Lightweight performance is my top priority, so every gram you can shave off the finished assembly is valuable, provided structural integrity is never compromised. You are free to recommend the most suitable printable polymer—PLA, ABS, Nylon, or a blend—so long as the final parts remain cost-effective for low-volume production and straightforward to swap out when wear occurs. I expect the design to be optimized for standard hobby-grade stepper or small DC motors typically used in e-scooters and micro-EVs, with gearing ratios that deliver the necessary torque without adding excess bulk. Deliverables • CAD model ready for 3D printing (STEP + STL) • Exploded assembly drawing that shows how each module fits together • Basic gear and load calculations or FEA summary demonstrating the design’s safety margin I will prototype the first unit myself, so the files must slice cleanly in Cura or PrusaSlicer with minimal support. If you have prior experience creating lightweight printed gearboxes or similar drivetrain components, please share a screenshot or brief note—seeing a proven approach will help me award the project quickly.