I need a production-ready 3D CAD model for a round 40 mm watch case that stays within an overall height of 10–11 mm. The case will be machined from titanium/ stainless steel and should follow a clean, minimalistic aesthetic—no ornamental engravings, extra crowns, or sporty add-ons. Your file should be ready for CNC or MIM manufacture, so please model any features normally required to house a standard mechanical or quartz movement of this size, including: Movement holder cavity Case-back fit with threads Crown tube Gasket seats Respect realistic wall thicknesses for titanium Surface transitions must be smooth enough to accommodate brushing or polishing. Key Specifications: Case diameter: 40mm exactly Case thickness: 10-11mm total (slim profile) Lug width: 20mm straight (for standard straps) Lug-to-lug: 47-48mm Lug holes: Standard 1.2mm, centered CRITICAL: Threaded Top External threads on upper case (for screw-on bezel/cover) Fine pitch: 0.5mm Thread length: 3-4mm Flat shoulder/seat below threads Crystal seat must sit below thread start Crystal: Flat sapphire crystal seat Below thread start Standard thickness allowance (~1.0-1.2mm) Case Back: Screw-down type with standard threads Gasket seat included Movement Compatibility: For standard quartz chronograph movement (similar to Seiko V192) Movement cavity must accommodate movement height ~5mm Date window at 4:30 position Stem hole at correct height Deliverables Required: Native CAD file (SolidWorks, Fusion 360, or similar) STEP file (for factory/manufacturing use) STL file (for 3D printing prototypes) Dimensioned drawing confirming 40mm diameter and 10-11mm height limits Technical drawing with all tolerances Requirements: Mechanical CAD experience with precision components Experience with threaded parts and tight tolerances (±0.05mm) Understanding of CNC machining requirements for titanium Portfolio showing similar precision mechanical work Must show previous CAD work (no generic proposals) Budget: based on proposal and right candidate Timeline: 1-2 weeks I will review the model against measurements and overall visual simplicity before releasing approval.