Original Prusa i3 MK2 Multi Material upgrade release - dual/quad extrusion
Why the open web links it
Demonstrates a new 3D printer upgrade enabling multi-material printing with up to four colors or materials using a single hotend.
Linked by 6 independent sites, 3 of them widely read in the 2026-10 crawl of the open web, including hackaday.com, reprap.org, 3dprint.com, bricogeek.com, baconmilkshake.com.