I have an existing 3D model of a class ring intended for silver printing, but the size is off. I only need the inner diameter adjusted to the correct ring size while leaving every other detail exactly as it is. You’ll receive the current print-ready file along with the target size (US ring size will be provided once we start). After resizing, the model must remain watertight, maintain all engravings and relief work, and pass standard print-preparation checks (no non-manifold edges, intersecting faces, or inverted normals). Deliverable: one updated, error-free STL (or the same format I supply) ready for direct upload to a 3D printing service handling sterling silver. I can run a quick verification in Netfabb or Meshmixer, but if you already include a screenshot of your final mesh analysis that speeds things up.