Engineering Designer Needed for Product Enhancement

I'm currently working on a project that involves a mannequin with a unique limb articulation method. The design is solid, but I've run into some mechanical issues that I believe an engineering expert can help me solve.

Key Requirements:
- Improve the design of the ball joints to increase their durability
- Ensure the overall structural integrity of the product

Ideal Skills and Experience:
- Expertise in mechanical engineering
- Previous experience with product design improvements
- Strong understanding of ball joint mechanics
- Ability to assess and enhance structural integrity