Classic Decor STEP Model

I have a clear vision for a small decorative piece in a timeless, classic style and I need it translated into a clean, watertight STEP file ready for 3-D printing in PETG. Once I share a sketch and key dimensions, your task is to model every curve and relief so it looks as though it came from an antique workshop yet prints flawlessly on a modern FDM machine. The file must import without errors into Fusion 360 and SolidWorks, show no non-manifold edges, and be properly shelled for PETG’s typical 0.4 mm nozzle settings. Please optimise wall thickness and overhangs so the final print requires minimal supports. Deliverable: • A single, error-free STEP file that matches my description and passes native geometry checks. When you hand it over I will run it through my own slicer; if it slices cleanly and the preview shows no gaps, the job is done.