It's Here
The AUTO-CART Complete Build Package is live. This is the real working manual for the cart — the same document the project actually runs on — rebuilt for people who want to build their own, including the parts that went wrong, because those are the expensive lessons and you shouldn't have to pay for them twice.
- The 67-page build manual — every chapter color-coded: green for the RC build, purple for the autonomy stack. Want the remote-control cart without the robot brain? Build only the green and skip about $1,000 of parts.
- The measured frame cut sheet + blueprint — the actual cut list off my cart, piece by piece, with the weld sequence and tolerances, plus a shop-wall frame drawing to match.
- The complete parts list — every component with real prices, as a PDF and a spreadsheet, so you know what you're signing up for before you cut metal.
- All 30 print files — the hubs, battery box, mounts, bumpers, and jigs, with print settings and the carbon-fiber-nylon rules that keep the filament from eating your printer.
- Wiring and pinout reference — the map the real cart is wired to.
- The build-along video series — I'm building the next cart on camera. Buyers get every episode as it drops.
- Free updates forever — this cart is a living project. Buy once, get every revision.
Get the Complete Build Package — $79. Includes the manual, document package and STL pack. Begin with the Start-Here home screen.
From the 2022 Frame to the 2026 Cart
The frame you'll build is the same one that's been hauling gear since 2022. I built the original cart over a couple of months in 2022. The conversion to the current machine started in May 2026.
Try Before You Buy
Read the free preview (PDF) — the full chapter map and every plain-English overview, with the technical content redacted. You'll see exactly how deep the guide goes before spending a dollar.
Still Free
The rest of the site stays free, always: the project story, the engineering write-up, and the interactive 3D model you can spin around and x-ray.
Two write-ups that answer most of what people email me, no charge: how to build an electric beach wagon — the five decisions that decide whether a scratch build survives soft sand — and converting an existing cart, including the hub-spin failure that shears valve stems and ends beach days.