Prototype Evaluation & Product Design Enhancement for 3D Printing

I need an experienced product designer/engineer to refine my cardboard prototype and prepare it for 3D printing.

While 3D design is important, I am specifically looking for someone with an engineering or product development background to:
1. Evaluate the working/functionality of my prototype
2. Suggest improvements to increase efficiency, durability, or usability
3. Provide guidance on optimal mechanisms or structure (before jumping into design)

Once this is finalized, we will move to 3D modeling and printing phase.

Phase 1: Engineering Evaluation + Functional Design Suggestions

Phase 2: CAD Design + 3D Printing Preparation

Key tasks:
- Enhance product efficiency and functionality
- Suggest design improvements
- Create a digital 3D model for prototyping

Ideal skills and experience:
- Strong background in product design and engineering
- Proficiency in 3D modeling software
- Experience with prototypes and 3D printing
- Ability to improve product efficiency and functionality

Looking forward to your bids!