I have a set of reference images that outline the overall look, dimensions, and proportions of a new product concept. What I need is a clean, watertight 3D model that captures only the basic shape and size—no intricate surface detailing or internal mechanics required at this stage. Once the model is complete, please provide it in either .OBJ or .STL format (both if it’s convenient). The file should be ready for quick print tests, so keep polygon count efficient and ensure the scale matches the dimensions shown in the references. After I send the images, feel free to raise any clarifying questions before you start; accuracy of the outer form matters most.