3D Architectural Model Cleanup & Optimization for 3D Printing (Metz Cathedral)

We are looking for an experienced 3D artist or CAD designer to clean up, refine, and finalize a 3D printable model of the Saint-Étienne de Metz Cathedral. I already have rough 3D files/draft plans to serve as a base, so you won't be starting from scratch The primary focus of this job is retouching, mesh optimization, and fine-detail adjustment. Key Requirements & Constraints: 3D Print Ready: The final mesh must be 100% watertight (manifold), error-free, and optimized for resin (SLA) and powder (SLS) 3D printing. Scale & Detail Balance: The model will be produced at two main scales (a compact 6x6x6 cm version and a larger display edition). You must balance hyper-realistic architectural detail with practical wall thicknesses, ensuring delicate features (spires, arches, window tracery) are durable and won't fail during printing. Subtle Detail Exaggeration: Certain micro-details need to be slightly emphasized/thickened so they remain crisp and visible after printing. Clean Geometry & Base Integration: The bottom of the cathedral needs a clean, flat dapping plate/pedestal interface so it sits seamlessly on a display base. Deliverables: Cleaned source file (.blend, .obj, or .step) + fully sliced-ready .stl / .3mf files.