I need a hand-drawn design input into a CAD and converted into an STL or OBJ file for 3D printing. The part is a small, functional replacement for a vintage pushbutton car radio. Requirements: - Basic shape and dimensions - Functional component with moving parts - Suitable for plastic printing Ideal Skills and Experience: - Proficiency in 3D modeling software - Experience with functional parts design - Familiarity with STL/OBJ file formats Please ensure the model is accurate and ready for 3D printing.