Indianapolis, IN – The vibrant and ever-expanding universe of Star Wars droids continues to captivate enthusiasts, driving a global community of makers known as droidsmiths to recreate and innovate beloved robotic characters. As highlighted by the recent DroidCon 2025 in Indianapolis, this burgeoning movement, which began with the iconic R2-D2, has evolved significantly, embracing cutting-edge technologies and fostering an unparalleled spirit of collaboration among its members. From the intricate mechanics of spherical astromechs to the imposing presence of bipedal security droids, the dedication of these builders pushes the boundaries of fan-made replicas, blending art, engineering, and passion.
A Legacy Ignited: The Astromech Builders’ Enduring Influence
The foundation of the modern droid-building phenomenon can be traced back decades, particularly to the fervent admiration for R2-D2. Make: magazine, a long-standing champion of the maker movement, first recognized this dedication in its second issue in May 2005, profiling the pioneering R2 Builders Group. This early acknowledgment helped solidify a community that has since grown exponentially, mirroring the expansion of the Star Wars cinematic and television universe. The R2 Builders Club forum at astromech.net remains a central hub, a testament to its enduring influence. Here, makers converge to share invaluable knowledge, meticulously reverse-engineered blueprints, and sophisticated 3D models. These digital assets are often derived from painstaking analysis of movie footage or, in some rare cases, direct measurements of screen-used droids, forming the bedrock for highly accurate replicas.
The collaborative ethos of the R2 Builders Club is its greatest strength. Plans are meticulously designed to accommodate a diverse range of building styles and resource levels. Whether a builder prefers the tactile satisfaction of hand-cutting styrene sheets, the precision of CNC, waterjet, or laser cutters for wood and aluminum parts, or the convenience of 3D printing entire droid components, the community provides comprehensive guidance. This accessibility is further enhanced by "parts runs," where members collectively procure materials or custom-fabricated components, democratizing the building process for those without access to specialized tools. This collective spirit ensures that the barrier to entry remains relatively low, encouraging new talent and diverse approaches to droid construction.
Technological Leaps: New Methods and Enhanced Functionality
The landscape of droid building has undergone a significant transformation since Make:‘s 2016 guide on constructing a life-sized, remote-controlled R2-D2. Advancements in manufacturing and electronics have introduced novel methods and significantly enhanced the functionality of these fan-built robots.
3D printing, once primarily used for small, intricate details known as "greebles," now allows enthusiasts to print entire droid bodies. The MrBaddeley Printed Droid group, led by Michael Baddeley, exemplifies this shift, offering fully printable R2-D2 models and fostering a vibrant online community on platforms like Facebook and Patreon. For those who prefer the metallic authenticity of screen-accurate droids, online custom fabrication services like SendCutSend and OSH Cut have become game-changers. Builders can upload club blueprints, receiving precisely cut aluminum parts with minimal personal tooling required, bridging the gap between digital design and physical fabrication.
Electronic components have also seen remarkable evolution. Builders now have a wider array of motor options, moving beyond traditional brushed scooter motors to embrace highly efficient and precisely controllable brushless motors such as the Q85 and Rev Neo. Drive systems like the MaxDrive have been developed to support both options, while control software like SHADOW has been updated to integrate these newer technologies seamlessly. The cost and size of crucial electronic components have been reduced by inexpensive hardware like DFRobot’s DFPlayer audio module and the versatile ESP32 processor. This has allowed for more sophisticated internal systems without increasing bulk or expense. The community continues to collaborate, sharing code and updates for these new components, as well as for established favorites like the MP3 Trigger and Arduino Mega.
One of the most exciting innovations is the Human-Cyborg Relations hardware and software, which generates unique vocalizations for R2 and other astromechs. Moving beyond a fixed set of sound files, this system draws on original speech patterns and phonemes, bringing a new level of authentic "personality" to the droids. Furthermore, the Kyber Control System has revolutionized user interaction, allowing builders to add multiple buttons to sBus-capable RC receivers to trigger complex sounds and animations. Designed with droids in mind, it integrates effortlessly with popular hardware like Pololu Maestro servo controllers and the MarcDuino animatronic controller, enabling intricate and lifelike movements.
The Expanded Universe of Droid Replicas
The enduring appeal of Star Wars has spawned a diverse array of droids beyond R2-D2, each inspiring dedicated communities of builders. Whenever a new droid makes its on-screen debut, makers worldwide immediately begin the painstaking process of deciphering its mechanics and recreating it.
BB-8: The Spherical Sensation
Introduced in The Force Awakens (2014), BB-8 presented a unique challenge with its spherical, self-righting design. Lucasfilm’s initial prototypes for filming included puppetry, greenscreens, and "trike" versions. However, the unveiling of a truly free-rolling BB-8 at Star Wars Celebration 2015 ignited a new wave of builders. The BB-8 Builders Club forums and Facebook group (bb8builders.club/forum) quickly became repositories for shared plans and 3D models.
The BB-8 Build Team — Psy DeLacy, Chris Stroud, David Ferreira, Matt Hobbs, and Alex Coajou — epitomizes the community’s collaborative spirit. Starting in 2019, they embarked on a ground-up redesign, optimizing for SLS printing and integrating quality-of-life improvements like keyed frame assembly, pogo pin connectors, and easy hardware access. They rigorously tested motors and actuators for optimal performance, developing custom boards and batteries. By Celebration Anaheim in 2022, their BB-8 was ready, with Chris Stroud refining its programming for stability and performance. Features like "free animation," where BB-8 subtly looks in the direction it’s turning, add a layer of lifelike realism, reducing operator burden and enhancing character. Their BB-8 has since toured major events globally, proving the success of their innovative approach.
K-2SO: The Bipedal Guardian
K-2SO, the sardonic security droid from Rogue One (2016) and Andor, presented a different kind of challenge: a seven-foot-tall bipedal robot. While seemingly a domain for industrial robotics giants like Boston Dynamics, dedicated droid builders have tackled this formidable task. Many K-2SO builds are static, but some are fully articulated. Droid Division (droiddivision.com) offers a full 3D printable model, and the K-2SO Builders Club on Facebook provides a platform for knowledge sharing.
Darren Moser (drscifi) is a prime example of this ambition. Starting with the Rogue One trailer in 2016, his dream was a puppet K-2SO. His initial Version 1 utilized PVC pipe, EVA foam, and a tactical vest, allowing him to wear the droid. Over eight years, K-2SO evolved through five versions, a true "Droid of Theseus." Each iteration saw improvements in foam sculpting, 3D printing, programming, and painting. For Star Wars Celebration Anaheim 2022, a major rebuild focused on exterior smoothness, but exposed internal weaknesses. The latest Version 5, completed in spring 2025 for the Andor Season 2 premiere, incorporated stronger knee joints for static poses, PEX pipe pistons for mechanical illusion, and a highly responsive head mechanism (developed by Travis Butler from Dave Moog’s files) with articulated eyes. Crucially, Darren developed a bike cable linkage system for K-2SO’s hands, allowing gestures like pointing and fist-bumping, controlled by a custom puppet controller with dual joysticks and twin cameras for operator vision. Weighing around 30 pounds and offering 4 hours of runtime on a Ryobi battery, Darren’s K-2SO embodies his philosophy: "It’s important to find joy in both the workshop and the showcase. We cannot just live in one." He anticipates further upgrades for Star Wars Celebration Los Angeles in 2027.
B2EMO: The Loyal Scrapper
Andor also introduced B2EMO, a loyal, compact salvage droid characterized by its expanding/retracting feet, multi-segmented spinning body, articulated head, and omniwheel-enabled strafing. Lucasfilm’s commitment to practical effects for Andor made B2EMO an achievable goal for builders. Michael Baddeley’s V2 files are a popular starting point, but the B2EMO Droid Builders Group on Facebook thrives on collective innovation.
Steven Dodds and Brian Dodds embarked on their B2EMO project in December 2024, aiming for the Andor Season 2 premiere. Their highly customized build integrates Baddeley’s files with modified head mechanisms (from David Ferreira’s "Pro" design) and a variation of Tim Hebel’s prototype drive system. Brian, handling internal mechanics and wiring, custom-machined aluminum components, including adapter rings for brushless motors within the 6-inch Mecanum wheels, granting B2 its omnidirectional movement. Steven focused on the exterior and code, utilizing a 3D printer almost continuously for ABS plastic shells, then meticulously gluing, sanding, texturing, and distressing them to achieve a screen-accurate damaged look. Paul Thomson contributed paint and weathering expertise. Steve also programmed the lights, edited sounds, and implemented code-controlled motion. Their B2EMO replicates all on-screen movements, including "turtle mode," and features customizable RC control. As B2 would say, "I’m very pleased to meet you all."
D-O: The Quirky One-Wheeler
The Rise of Skywalker (2019) introduced D-O, a self-balancing, one-wheel droid with a distinctive personality. Its backstory – cobbled together from workshop scraps – resonated deeply with the maker community. Disney unveiled a working D-O at Star Wars Celebration in April 2019, prompting builders to immediately begin creating 3D models from event footage. Many fan-built D-Os were completed even before the movie’s December release. Michael Baddeley created the first replica, followed by Matt Denton, who worked on the official movie prop and documented his build in a comprehensive YouTube series, inspiring countless others. The D-O Builders Club on Facebook continues this collaborative effort.
Steven Foster, encouraged by fellow builder Chris Stroud, leveraged Denton’s tutorials, eventually redesigning D-O almost entirely from scratch despite no prior CAD experience. With feedback from Psy DeLacy, Neil Hutchison, and Dave Ferreira, his D-O achieves remarkable screen accuracy in appearance and behavior, exemplifying the community’s continuous pursuit of perfection.
RX Series Droids: The Pilots and DJs
Inspiration for droid builders extends beyond films to beloved theme park attractions. Disneyland’s Star Tours introduced RX-24 ("Rex"), the animatronic captain. Later, Rex was re-purposed as DJ R-3X in Oga’s Cantina at Galaxy’s Edge. Builders have created plans, 3D models, drive systems, and speech synthesis software for both versions. The "CantinaOS" project, leveraging ChatGPT, aims to enable R-3X to converse in character, showcasing the integration of advanced AI. The RX Series Droid Builders Club on Facebook unites these specialized makers.
The RX-91L, or "Gil," debuted at Star Wars Celebration Anaheim 2022, brought to life by David Ferreira, Chris Stroud, Matt Hobbs, Patrick Gray, and Trevor Zaharichuk. Gil, with his complex drive system, three arms, and multi-axis head, presented operational challenges, leading the team to develop both one-player and two-player control modes. "Free animation," where the visor subtly rotates with head movement, adds to his lifelike charm. Gil’s voice, controlled by the operator via a headset, drives the lights in his mouthpiece. Extensive "research trips" to Oga’s Cantina and Star Tours were crucial for capturing authentic timing, hardware details, and performance nuances.
BDX Droids: The AI-Powered Ducklings
A significant leap in droid autonomy arrived in 2023 with Disney Imagineers’ unveiling of the real-life BDX Droids, affectionately known as "Duckling Droids." These small, bipedal droids, often seen in packs with trainers at Galaxy’s Edge, represent a collaboration between Disney, Nvidia, and Google DeepMind. Utilizing AI for incredibly lifelike motion and emotional interaction, they surpass traditional animatronics. Anticipated to appear in The Mandalorian and Grogu movie in 2026, they’ve spurred a new wave of builders. The BD-X Duckling Droid Builders club on Facebook facilitates the development of plans, models, and software for replicating their personality.
Jaime Machuca, a robotics engineer and ArduPilot Dev Team member, began his BD-X project in August 2024, inspired by Disney’s GTC presentation. His build combines PLA-CF 3D-printed parts with CNC-machined components, off-the-shelf electronics, and dual Nvidia Jetson Orin NX computers. Jaime is training his droid with reinforcement learning to mimic Disney’s version, with the project slated to be fully open-sourced for ROS 2 and non-ROS users. Collaborators like Mimir Reynisson, Psy DeLacy, Antoine Pirrone, Mankaran Singh, and Grégoire Passault are accelerating the project, with Mathew Collins developing a Steamdeck controller app. An accessible walking version, Open Duck Mini, is already available on GitHub with a growing Discord community.
MSE-6 (Mouse) Droids: The Compact Utility
The humble MSE droid, a ubiquitous presence since A New Hope (1977), zipping through Imperial ships, remains a popular and accessible build. Builders use 3D printing, styrene, wood, and aluminum to create faithful replicas and customized versions like "Mousezilla," capable of carrying riders or towing astromechs. The Mouse Droid Builders Club (mousedroidbuilders.club) and its Facebook group are excellent resources.
Romano and Connie Bassi’s MSE droid, inspired by Robot Chicken, is externally screen-accurate, featuring a vacuum-formed styrene shell, real computer IC chips as greeblies, and 3D-printed enhancements. Mounted on a modified RC car chassis with off-the-shelf electronics, its unique feature is a miniature cockpit housing two animated mice: MSE-3827 (driver) and MSE-421 (supervisor). These 3D-printed figures, with needle-felted heads and sculpted clay extremities, wear repurposed 1:6 scale Imperial officer uniforms. Servos provide head and body movements, including a leaning action when a hidden side door opens. LED lighting, Maestro controller programming, and RC-triggered sound effects (including A New Hope clips and mouse squeaks) complete this charming build.
GNK-series Power Droid (Gonk): The Enduring Powerhouse
Another classic from 1977, the GNK droid (Gonk) is found across the galaxy. Its simple, boxy design makes it one of the easiest droids to build, often starting with two stacked plastic storage bins. Builders then personalize them with lights, vents, holoprojectors, and even functional charging ports. The Gonk Droid Builders Group on Facebook showcases the creativity within this community.
Mike Longo’s fascination with the Gonk droid from the Jawa’s sandcrawler led him to build his own. Discovering an oddly shaped plastic tote, he began his project, using a 3D printer for feet and greeblies, and designing unique parts like the E-shaped side panel. Found objects, like a silver-painted bungee cord for cabling and a food storage container for the "face," add character. His son Nick helped wire four LED lights. PVC plastic boards, heated and bent, concealed seams, reinforced with 3D-printed brackets. Functionality was added with a portable charger, powering LEDs and an MP3 player, and offering external phone charging ports. Mike, currently weathering his granite gray and midnight blue Gonk for an aged look, embodies the spirit of bringing childhood marvels to life.
C-Series Astromech Droid ("Chopper"): The Cantankerous Co-Pilot
The C-series droids, considered obsolete during the Galactic Empire, gained fame through C1-10P, affectionately known as Chopper. First appearing in the animated Star Wars: Rebels, Chopper’s distinct personality — cantankerous and fiercely loyal — made the leap to live-action in Rogue One and Ahsoka. Builders embrace both animated and live-action aesthetics. The Chopper Builders group on astromech.net and Facebook is dedicated to replicating this unique astromech.
Jaime Acevedo and his wife, inspired by Chopper’s non-subservient personality, built their Chopper using Michael Baddeley’s 3D printable files. Recognizing the complexity of animating Chopper, Jaime developed several custom controllers. A phone app and game controller wirelessly connect to an ESP32 within the droid, granting full control over actions. For stealthier interactions, a palm-sized controller offers quick access to commonly used sounds and actions, allowing Jaime to seamlessly bring Chopper’s expressive character to life at events.
Treadwell Droids: The Humble Laborers
WED Treadwell droids, minor but memorable characters, appear across the Star Wars saga, from moisture farms to the Millennium Falcon. Paul Thompson, inspired by a childhood photo of Luke beside a Treadwell, began his build in 2009 when information was scarce. His persistence, alongside other "droid sleuths," led to groundbreaking discoveries: the "eyes" were internal lenses from a Paterson Trident 35mm slide viewer, the gripper claw a repurposed pickle fork, and the tracks a 3-inch race car blower belt turned inside out. This allowed for accurate dimension extrapolation.
Paul’s Treadwell is a masterful blend of wood (for the head), aluminum (for the mast), plastic, 3D-printed components, and found parts. The mast supports five arms, crafted from printed parts, metal tubes, vinyl hoses, and found items. A wooden base cleverly conceals the battery and electronics. Paul Thompson and Ross Saggio are now developing detailed build plans for the Treadwell Builder’s Club on Facebook, ensuring this humble droid’s legacy continues.
Scrubber Droids: The Unsung Cleaners and Racers
First seen in The Phantom Menace, the Scrubber droid is an unassuming utility bot. Early builders ingeniously discovered its core was an inverted 8-gallon storage tote on wheels, often an R/C car chassis. The ruggedness of these totes quickly led to an unexpected pastime: Scrubber racing and smash-up derbies at droid builder gatherings. The Scrubber builders group on Facebook, and shared forums with Mouse droid builders, fosters this playful sub-community.
Jesse Maricelli, an electrical engineer and robotics enthusiast, was drawn to the Scrubber droid after witnessing a chaotic racing competition. Using a screen-accurate Action Packer for the shell, he blended standard 3D-printed greeblies with "found parts" like power transformers from an old DLP TV for side details, a medical squeeze bottle top for radar, and a toilet float arm bracket. A unique feature is a repurposed iPhone displaying custom animations on the rear, mimicking a status screen. Built from PLA, resin, ACM, and thin aluminum, the scrubber uses Sabertooth motor controllers, an Arduino Mega, and PS3 Move Navigation controllers. Running a modified SHADOW software, it features Mecanum wheels for omnidirectional movement. Jesse’s Scrubber, a quick project, demonstrates the boundless creativity within the community, always looking towards the next inspiration from a galaxy far, far away.
The Enduring Impact of Droidsmiths
The global Star Wars droid-building community is more than just a collection of hobbyists; it is a dynamic ecosystem of innovation, collaboration, and learning. From reverse-engineering blueprints to developing custom electronics and AI-driven behaviors, these droidsmiths are actively engaging with complex engineering challenges. They foster skill development in CAD, 3D printing, circuit design, programming, and mechanical fabrication. The collaborative nature of online forums and clubs ensures that knowledge is freely shared, accelerating progress and making sophisticated projects accessible to a wider audience.
The blurring lines between fan-built replicas and professional animatronics, as seen in the increasing sophistication of projects like the BDX Droids, highlight the significant contributions of this community to the broader fields of robotics and interactive technology. These droids not only bring joy to countless fans at conventions and public events but also serve as tangible examples of what passion, ingenuity, and collective effort can achieve. The future promises even more advanced, interactive, and personalized droids, ensuring that the legacy of the droidsmiths will continue to evolve, inspire, and entertain for generations to come.
This article appeared in Make: Volume 94, reflecting Make: magazine’s ongoing commitment to showcasing the ingenuity and passion of makers worldwide. The community is invited to discuss this article further on the official Discord server.
