I need an experienced 3D CAD designer / mechanical design engineer to create accurate 3D printable models (STL/STEP) from a set of 2D sketches (PDFs + images). Each part is available as a 2D drawing (PDF/image), but no dimensions are provided. However, I will give reference scale measurements (one or two known dimensions) to help you build and proportion the models correctly. I also have two short working videos of the current prototype showing how the assembly works. A small functional change needs to be made in the design (I’ll explain this clearly with examples once we start). Requirements: Convert 2D sketches to 3D CAD models suitable for 3D printing. Maintain correct proportions and assembly fit. Apply one minor design modification as explained in the video reference. Ensure models are watertight and print-ready (no mesh gaps or errors). Provide STL, STEP, and native CAD files (e.g., Fusion 360 / SolidWorks / FreeCAD). First draft by November 15–16 for feedback. Final approved version by November 20, 2025 (strict deadline). Two revisions included in case small tweaks are needed. What I will provide: - All 2D sketches (PDF/image files) - Two working videos showing the mechanism - 1–2 reference dimensions for scaling - Quick feedback on every draft (within 12 hours) What I expect from you: - 3D models identical to sketches and videos - Incorporate the described design change correctly - Deliver STL/STEP files ready for 3D printing - Good communication and on-time updates Skills Required: 3D Modelling SolidWorks / Fusion 360 / AutoCAD / FreeCAD Product Design / Mechanical Design STL / STEP file preparation for 3D printing(manufacturable) Budget: $150 – $200 USD (Fixed Price) Deadline: November 20, 2025