DESIGN A MOD FOR YOUR 3D PRINTER.
GET A GRANT TO REWORK IT.
HACK CLUB SLACK
$75
grant per mod
1kg
hack club filament

This used to be a Creality Ender 3! ⤴

WHAT IS THIS?

Hack Club Rework gives you $75 + exclusive free filament to physically modify your 3D printer.

Got an old Ender 3? Make it print faster. Got a Bambu? Hack it and add custom features. Have a unique idea? Make it happen. Rework is made for all hardware based 3d printer mods

Design submissions for Rework end on March 6th, 2026. Get started early and post your progress in the Hack Club Slack!

WHAT COUNTS AS A MOD?

Your project needs to involve actual hardware modifications designed by you. View examples here

✓ YES — THESE COUNT

Custom Toolhead
Custom Toolhead
Design a custom toolhead for your printer for a new hotend, extruder, or fan combo
Linear Rail Upgrade
Linear Rail Upgrade
Replace V-Wheels with linear rails for extra rigidity and precision
Filament Sensor
Filament Sensor
Add a filament runout sensor to your printer to avoid failed prints
Multi Material Upgrade
Multi Material Upgrade
Design a mod to add multi-material printing capabilities to your printer

✗ NO — THESE DON'T

Installing Klipper
Installing Klipper
Software-only changes don't count (but Klipper + hardware does!)
Tuning Slicer Settings
Tuning Slicer Settings
Changing temps, speeds, or flow in your slicer does not qualify as a mod
Pre-made Kits
Pre-made Kits
Your mods must be designed and built by you, not a pre-made upgrade kit
High Voltage Upgrades (60V+)
High Voltage Upgrades (60V+)
Please avoid high voltage modifications for safety reasons, please contact us if unsure!

FREQUENTLY ASKED QUESTIONS

M115 // SET LCD MESSAGE
Who can participate in Rework?

Rework is open to Hack Clubbers aged 13-18 of all experience levels.

Everyone from experienced modders to people who just got their 3D printers are welcome!

M24 // START PRINT
How many mods can I make?

You can make as many mods as you want!

Please order parts for one design before submitting another!

M200 // SET FILAMENT DIAMETER
Can I spend the grant on filament?

Please spend the grant only on hardware you need for the project.

We will reimburse you for filament rounded to the nearest 250g.

M117 // DISPLAY MESSAGE
Where can I get feedback on my project?

You can post your progress in #rework!

We love seeing unique and exciting mods made by the community, and would love to help you with any issues you are facing.

G4 // SET DWELL TIME
When does Rework end?

Rework design submissions end on March 6th, 2026!

Build submissions will be open until March 20th, 2026.

HACK CLUB SLACK HOW TO REWORK

Got an old printer? Time to rework it.

Check out featured mods from the community →

A HACK CLUB PROGRAM