Prototype Design for Stamping Mechanism

I'm in need of an innovative design for a product that involves a stamping motion using servo motor, gears, and other accessories. The project is focused on developing a prototype.

Key requirements include:
- **Material**: The prototype should primarily work with metal.
- **Customization**: The stamp design needs to be interchangeable; this means the design should allow for multiple stamp designs to be used.

**Ideal Skills & Experience**:
- Mechanical engineering background with a focus on product design.
- Experience working with servo motors, gears, and metal fabrication.
- Knowledge of prototyping and creating interchangeable components.

I'm looking for a freelancer who can not only design the product but also provide insight into the best materials and methods to achieve a functional, efficient prototype.