vault piggy bank 3d model

Create a 3D-printable piggy bank as an STL file, shaped like a realistic bank building similar to a classical European bank facade. The building must be hollow for storing coins, with a wall thickness of 2.5–3 mm. Add a rectangular coin slot on the roof. On the front facade, add a large round vault (safe) door design. Above the vault, add correctly spelled raised text: “Sparkasse”. Below this text, add a flat blank plaque without any text, intended for later customization. On the LEFT side of the building, integrate a tunnel boring machine that clearly drills INTO the building wall (never outward). The drill head must point into the building and visually connect toward the vault area. The tunnel boring machine must be a separate solid part, not merged with the building, and designed as a key-like object (non-round shaft). The piggy bank must be openable from the BOTTOM using a simple, reliable twist-lock or threaded lid. The opening must be secure and not open accidentally. Avoid