What's included in the AUTO-CART build package?

A 57-page build manual, a measured frame cut sheet and blueprint, the full parts list with real prices, a wiring reference, and all 31 3D-print files. Every chapter is color-coded — green for the remote-control build, purple for the autonomy stack — so you can build only what you want.

Can I build just the remote-control cart without the autonomy?

Yes. The manual is color-coded so you can follow only the green (RC) chapters and skip the purple autonomy stack, leaving out roughly $1,000 of parts. You can always add the follow-me system later.

Do I get updates to the build guide after I buy it?

Yes — free updates for life. When the guide is revised, buyers re-download the newest version from their purchase link at no extra cost.

The Manual

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 57-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 31 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. Two downloads, opens to a single Start-Here home screen.

On the waitlist? Your $20-off code is in your email. Just want the print files? The standalone STL pack is $24 (it's included free in the full package).

Where It Started — Summer 2022

The frame you'll build is the same one that's been hauling gear since 2022. These are the original build photos — bare aluminum to first ride — so you can see exactly what you're signing up for (and that a driveway, a welder, and a stubborn weekend are enough).

The whole 2022→2026 story in one film — more on YouTube → @KMJDynamics.

One welded aluminum frame.

Balloon tires on — it rolls.

Chief inspector approved the deck.

Wood rails up.

V1 electric — the first taste of power.

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.