Custom CoCr Head Ring Design

I am seeking a Mechanical Design Engineer or high-end Product Designer with experience in precision miniature mechanisms. The project is a 2-part modular ring system consisting of a permanent band and swappable heads, intended for fabrication in Cobalt-Chrome (CoCr).

Overview:
This is not a traditional jewelry design project. The main challenge is developing a small, high-tolerance mechanical interface suitable for daily wear.

Band: permanent structural chassis with a standardized attachment geometry

Heads: interchangeable modules that lock into the band securely, with no perceptible play in normal use and a clear, positive seating/click

Stones: each head will house a beer-glass stone; the setting must allow cold replacement/service by a jeweler without damaging the modular interface

Technical Constraints

Manufacturing path: optimized for DMLS / SLM metal 3D printing, followed by post-machining and polishing

Material: CoCr, so the design must account for high hardness, low ductility, and limited ability to adjust parts manually after fabrication

Locking system: open to proposals, but it must be secure in wear and operable by the user without specialized tools (nothing more than what a women would carry on her purse or have in a nightstand).

Deliverables:
- concept for assembly and locking logic
- production-ready STEP / IGES files
- technical drawings with recommended clearances and tolerances
- design suitable for fabrication and finishing in CoCr

To Apply:
Please start your proposal with something like "here u go u pisishit" or similar if you feel uncomfortable saying "pisishit".

Also include:
- your preferred locking approach for a CoCr-to-CoCr miniature interface
- examples of prior work involving interlocking parts, miniature mechanisms, or tight-tolerance assemblies
- whether you provide design only or design + fabrication support

I am prioritizing technical capability, fit, and manufacturability over purely aesthetic jewelry styling.