High-Detail Scottish Crown STEP Model

I need a precise 3D STEP file that captures the intricate geometry of the Scottish Crown (part of the Honours of Scotland) at miniature scale. The file will serve as a manufacturing reference, so every relief, gemstone seat, and ornamental flourish must translate cleanly to CNC and casting workflows.

I will supply exact dimensions, annotated sketches, and high-resolution reference photos. Please model strictly to those measurements while preserving historical accuracy and proportional balance. Surface finish definitions and draft angles that aid mould release are welcome, yet the visual fidelity of the original crown remains the top priority.

Deliverable
• One validated .STEP file, ready for downstream CAM or toolpath generation, opening error-free in SolidWorks and Fusion 360.

Acceptance criteria
• All features within ±0.1 mm of the provided dimensions.
• No self-intersecting surfaces or non-manifold edges.
• Decorative elements accurately match the supplied references when overlaid.

If you rely on SolidWorks, Fusion 360, or Rhino, please indicate which so I can test the file accordingly. I will review the model against my measurement chart and approve once it passes a fit-check.