One-Photo Neck Relief and String Action Gauge for Guitar Setup

Deterministic Sub-Pixel Edge Fitting on Fret Crowns + Feeler Card Scale Reference + Quadratic Neck Bow Regression engine (.jpg, .png, .dng) built for Fender, Gibson, Ernie Ball — zero-upload ephemeral Wasm RAM execution.

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Double-click 2.4× zoom · Drag to pan / 3D orbit

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