Build guides that show you every step.

One page per step: what you need, what to do, and how to know you got it right. A 3D view of the part going on, and a source for every fact. If we don't know, the page says so.

Build the SO-101 robot arm → How the guides are made

F-010 Fit both horns on motor 1 (shoulder pan) · live 3D view, drag to turn

Every fact has a source

Each screw, size and motor assignment comes from the upstream files, a page with a retrieval date, or a video timestamp. Every step lists its sources.

We say when we're not sure

Steps no source confirms are marked unverified and stand-in shapes are marked approximation. Never hidden.

Works with any kit

Part numbers cross-referenced for 10 kit vendors. We sell nothing and take no cut.

Guides

SO-101 robot arm

52 steps across the follower and leader arms, 26 parts, servo and gear ratio per joint, 3D view per step.

More kits later

Same rules, same data model.

Source and corrections on GitHub.