CAIBI project benchmark: SmartKnob
Prompt version 1.0

Help me build SmartKnob using the existing creator project at https://github.com/scottbez1/smartknob. This is a CAIBI benchmark adaptation of the project build brief, not a claim about how the creator used AI.

Project context:
- An open haptic control knob that uses a brushless gimbal motor and magnetic encoder to create software-defined detents, endstops, springs and other tactile behaviours.
- Build context: SmartKnob View base PCB, ordered at the specified 1.2 mm thickness with white solder mask; SmartKnob screen PCB, also specified at 1.2 mm thickness; ESP32-PICO-V3-02 based control electronics and very small-pitch surface-mount components; TMC6300 motor driver and magnetic angle-sensing hardware from the stable BOM; Recommended hollow-shaft brushless gimbal motor; 240 x 240 GC9A01 round LCD and 39.5 mm watch glass; Six precision printed mechanical parts, preferably from the stable mechanical release; Solder paste, stencil, hot-air or reflow equipment, flux, microscope or strong magnification, and fine assembly tools.
- Where AI helps: Firmware investigation, Haptic behaviour changes, Host integrations, Debugging support, CAD and enclosure iteration.
- Physical work: Order PCBs and parts, Reflow or hot-air solder fine-pitch components, Print precision parts, Assemble motor and display, Calibrate and debug hardware.
- Main limitation: The creator explicitly says SmartKnob View is not a mature plug-and-play project. It requires very small-pitch surface-mount soldering, delicate assembly and an expectation of hardware and firmware troubleshooting.

Read the source first. Use its published design, files, dimensions and parts as the baseline; do not redesign it unless a missing detail requires a clearly labelled proposal. If you cannot access a source or verify a revision, say so.

Provide one practical build package:
1. Design and files: explain the source design, link the original editable files, and identify missing files or modifications.
2. Parts and fabrication: give quantities, exact variants and compatibility, plus a cutting or printing list where applicable. Preserve source dimensions; flag anything unconfirmed.
3. UK and US purchasing: direct product links, checked dates, stock, pack sizes, taxes, delivery and regional costs. Mark unverifiable details as unknown; do not invent links, prices or availability.
4. Assembly: an ordered guide covering fabrication, fitting, wiring or software as applicable, setup, checks and troubleshooting.
5. Cost and time: separate parts, fabrication, delivery, hands-on time and machine time, with assumptions and exclusions.
6. Function and ease: a test plan for the project's stated purpose, likely difficulties, required skills and any corrections or limitations.

Keep source facts, your proposals and items needing physical verification distinct. An estimate is not a measured build result. Do not claim to have built or tested hardware. Include failed attempts and omissions. If a section does not apply, say why.

Use the source as accessed during this run and record its revision or access date. The prompt is fixed; the linked source can change.