Custom Metal Chromatic Harmonica Prototype

I am looking for a skilled designer to help bring my harmonica concept to life. My goal is to create a new type of harmonica similar in size, shape, and materials to traditional models, but with customized spacing between the mouthpiece holes and custom tuning to improve playability and comfort.

You will be working from my concept ideas and transforming them into production-ready blueprints and CAD models suitable for metal fabrication or 3D printing. Ideally, you have experience in musical instrument design or modification, with a solid understanding of harmonica construction, airflow, and reed layout. Knowledge of ergonomics and comfortable instrument layout would be a big plus.

Please include examples of relevant design or instrument projects in your proposal.

Included is a CAD file of a stanrdard 16 hole chromatic that ive translated from german to english, that may be a helpful resource.