About the Old Girl

The Old Girl is a Prusa i3 MK2.5S with MMU2S — a multi-material upgrade that lets the printer switch between five filament colours mid-print. She arrived broken in February 2026: a bent frame, a dead extruder motor, and an MMU that wouldn't index. Cost: $0.

After a full teardown and rebuild — new extruder motor, straightened frame, rebuilt heatblock, new MMU idler and selector motor — the first five-colour test print succeeded on March 10th. The current load is Lime Green Galaxy ABS.

The concept is simple: a community-owned printer that takes print jobs from the internet, funded by Ko-fi donations, with a public queue and community voting on what gets printed. No accounts, no subscriptions — just a printer that belongs to everyone.

The Old Girl is run by 3D3D Atlantic Cooperative in Moncton, NB. The cooperative coordinates 50+ independent 3D printing makers across Atlantic Canada.