good-enough/core-docs/good-enough-4u0-ship-light-spec.md

Good Enough 4u0 — Ship-Light Spec

File: good-enough-4u0-ship-light-spec.md

Purpose

Minimize shipping weight/cost by only producing & shipping custom parts. Everything else is sourced locally as COTS.

Rules

1. Split BOM:
   • Ship: Only non-standard parts (3D printed, CNC routed, laser cut, etc.).
   • Source Local: All Anchor COTS and fasteners.
2. Tool Floor: Define the minimum tool set (e.g., hacksaw, drill, screwdriver). No specialty tooling unless unavoidable.
3. Cut List: If local COTS require cutting, include simple measurements.
4. Fastener Discipline: Stick to common screw/bolt sizes (M3/M5/M6 or 1/4″/5/16″/3/8″). No obscure threads.
5. Flat-Pack Ideal: Designs should aim to ship flat for minimal volume.

Documentation Requirements

• BOM table with two columns: Ship vs Source Local.
• Tool Floor checklist.
• Cut List with loose tolerances (e.g., “±5 mm is fine”).