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Kerfuffle Plastic Antweight Kit – Maker Edition
Kerfuffle 1lb Plastic Ant Combat Robot Kit – Maker Edition
Want to build a robot kit? Start your combat robotics journey with confidence! The Kerfuffle 1lb Combat Robot Kit is a plastic-antweight (1lb) flipper designed by BattleBots veteran Brandon Bennett Young, creator of Mammoth and Big Dill. With affordable 3D-printed parts, a simple drive system, and a wedge-plus-lifter design, it’s perfect for beginners to assemble, practice, and compete safely. This kit includes the internals only and does not include 3D-printed parts. For a complete kit with printed parts included, see the Complete Kerfuffle Kit.
Refined since 2019 and featured in Make: Magazine, the DragonCon Version 2 (2025) balances durability, control, and fun—ideal for workshops, classrooms, clubs, and events. Print, assemble, and start battling this weekend!
$149.99
Kerfuffle 1lb Combat Robot Kit
What it is / Who it’s for
Want to build a robot kit? The Kerfuffle 1lb Combat Robot Kit is a “plastic antweight” you can build with basic tools and a desktop 3D printer. It’s ideal for first-time builders, workshop leaders, and educators who want real robot-fight excitement without the high cost and risk of heavier classes. The Maker Edition lets you — or your favorite Maker (even if that’s you!) — 3D print the chassis and mechanicals using the CAD files we provide or your own custom design. For a complete ready-to-assemble package, see the Complete Kerfuffle Kit.
How it works
Kerfuffle prioritizes control and reliability over destructive energy. A low wedge gets under opponents, while a simple lifter flips or destabilizes them. Pair the radio, arm the bot, and drive: the setup rewards driver skill, makes practice safe, and even allows Kerfuffle-vs-Kerfuffle bouts without needing a full steel arena.
What’s included / What you’ll need
You’ll 3D-print the chassis, wedge, lifter, and top plate, then add standard combat-robot components (drive motors, ESCs, LiPo battery, radio, wheels, power switch). This kit provides all required internal electronics, receiver, and hardware, but does NOT include the 3D-printed parts.
Why this kit
Developed by BattleBots veteran Brandon Bennett Young and refined since 2019, Kerfuffle V2 is proven in competition and beginner-friendly. The design favors inexpensive spares, quick repairs, and smart driving habits you can scale to heavier classes later. It’s an excellent choice for building both driving and attack skills.
Learn more about Brandon on his team Bone Dead Robotics page. Brandon has been designing and competing with robots since 2010.
Safety & best practices
Follow LiPo charging and storage guidelines, enable failsafes through your radio/ESC settings, and test drive on a non-slip surface before sparring. Keep fingers clear of the lifter mechanism, and always power down using a physical switch between matches.
Learn more / Guides
Step-by-step build guidance appears in Make: Magazine’s Build Your First Combat Bot. For electronics and spares, see the Maintenance tab on this page for ESCs, batteries, radios, and other parts.
Features
- Beginner-friendly 1lb plastic antweight kit designed for safe practice
- Proven design that has successfully competed since 2019
- Reliable wedge-and-lifter layout that rewards driver skill
- Uses common off-the-shelf parts for easy sourcing and quick repairs — see the Maintenance tab for details
- Includes CAD files for the 3D-printed chassis, lifter, top plate, and hubs
- Refined Version 2 design for durability and simplicity
- Created by BattleBots veteran Brandon Bennett Young
- Perfect for workshops, clubs, classrooms, and first competitions
- Note: this version does not include the 3D-printed parts. For a complete kit, see the Complete Kerfuffle Kit
Kerfuffle’s design evolution:
“Kerfuffle originally began as a derivation of Bone Dead Robotics’ full-combat 1lb robot Ferocious, but rapidly became a legend in its own right after having fought dozens of times and boasting the highest win rate of any machine on the team.”
Source: Bone Dead Robotics
Kerfuffle Kit Bill of Material:
Need spares? These parts are compatible with the Kerfuffle kit and commonly replaced during combat wear and tear. Select the variant you need (like wheels) from the dropdown menus.
• Select 2.00in × 0.75in wheels
• Select 3mm shaft Repeat Brushed motors
• Select 3mm bore FingerTech Lightweight Hubs
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Kerfuffle Kit Add-Ons:
If this is your first bot, you will need a transmitter bundle and a LiPo charger. If you want to run your bot on 3S, you must add a UBEC (Universal Battery Eliminator Circuit) voltage regulator. Servos can only handle up to 9V, while a 3S battery delivers up to 11.4V — running without a UBEC will permanently damage your servo.
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Replacement & Maintenance Notes:
Routine Checks
- Inspect wheel set screws, servo horn screws, and power-switch mounting after each session.
- Verify that the lifter linkages move freely and the wedge remains flat to the floor.
Replacement Parts
- Keep spare wheels, hubs, servo horns, and a printed top plate on hand.
- Common electronics like tinyESCs, JST leads, and the Mini Power Switch are easy to swap between bouts.
Battery & Safety
- Charge LiPos with a balance charger in a fire-safe container, never unattended.
- Store packs at storage voltage, and retire any that appear puffy or damaged.
- Always power down using the physical switch before handling.
Basic Specifications
Core specs and common component choices for Kerfuffle V2. Dimensions vary slightly by print settings.
Bill of Material:
Note: does NOT include 3D printed parts.
| Specification | Details |
|---|---|
| Length | See CAD (can vary by print) |
| Width | See CAD (can vary by print) |
| Height | See CAD (can vary by print) |
| Weight | ≤16oz (1lb plastic-antweight class) |
| Class | Plastic antweight (1lb), friendly for workshops and practice |
| Drive Motors | Repeat Robotics Brushed Motors, 3mm shaft (pair) |
| ESCs | Repeat Robotics Dual ESC |
| Battery | Galaxy 300mAh 2S LiPo Battery |
| Wheels | 2.00in × 0.75in Snap Wheels (pair) |
| Hubs | FingerTech Lightweight Hubs, 3mm bore (match to motor shafts) |
| Main Power Switch | FingerTech Switch and Charge Jack |
| Connectors | JST 2-pin (pair) |
| Lifter Servo | Flashhobby FH-5515MG 15kg Servo |
| Power Connection | FingerTech Mini Terminal Blocks |
| Heat Shrink Tubing | Red and Black Heat Shrink Tubing 1/8″ |
| Receiver | FS-R6B (T6A/B) receiver, compatible with FS-CT6B transmitter |
| Hub Key | FingerTech Twist Hub Key — use to mount hubs to wheels |
| Hardware | Kerfuffle Hardware Kit. Includes Plastite screws #4 3/8in (Qty 5), #6 1/2in (Qty 4), and M3×15mm machine screws (Qty 2) |
Other needed parts:
Note: In general, you will only need to buy these once. If this is your first robot, you will also need a transmitter/receiver combo, a LiPo battery charger, and possibly a UBEC if you wish to use a 3S or greater battery. Do NOT run the bot on a 3S or greater battery without a UBEC — you will damage your servo!
| Specification | Details |
|---|---|
| Radio | FlySky FS-CT6B Transmitter Bundle |
| Voltage Regulator | 9V 4.5A UBEC (Optional — required if you run >2S batteries to protect the servo) |
| Charger | C6D Smart LiPo Charger |
FAQs
Do I need a full combat arena to practice?
No. Kerfuffle’s wedge-and-lifter design keeps energy low; you can practice on a non-slip surface with sensible spacing and a spotter. For sparring, add side barriers or use a small test box.
What printer settings work best for the chassis?
PLA+ or PETG with 30–40% infill and 0.2–0.28mm layers is a good starting point. Increase walls/perimeters for durability, and reprint spares so you can swap quickly on event day.
Can I upgrade parts later?
Yes. You can experiment with different wheel durometers, gear ratios, and servo arms, or reprint the wedge at a new angle. The electronics are standard antweight components, so they can be reused across future builds.
Is the radio included?
No, radios are sold separately. Kerfuffle uses a common 2.4GHz radio such as the T6A with TR6A receiver, or the FlySky FS-i6 with FS2A receiver. These are not cross compatible! The T6A uses AFHDS protocol, while the FS-i6 uses AFHDS 2A. Always match your transmitter and receiver. If you already own a compatible system, you can bind that instead and reuse it across robots.
Where can I find the 3D files?
Kerfuffle’s printable files are available under “Product Documents.” Print, test-fit, then sand or file as needed for smooth servo action.
Anything else I need?
If this is your first combat robot, you’ll also need a LiPo battery charger. We recommend the C6D charger for safe, reliable charging. Always follow LiPo safety guidelines when charging, handling, and storing your batteries.
⚠️ Servo Voltage Warning
Kerfuffle’s servo is designed for a maximum of 9V (2S LiPo). Do not connect it directly to a 3S or 4S battery — this will fry the servo.
If you want to run your bot at higher voltage, you’ll need a voltage regulator such as our UBEC (Universal Battery Eliminator Circuit). This safely steps down battery voltage to protect your servo.